bluuebunny/crossref_metadata_2025 huggingface dataset:
LIFE CYCLE OF FORFICULA SENEGALENSIS SERV. (DERMAPTERA: FORFICULIDAE) AND ITS RELATIONSHIP TO THE DEVELOPMENT OF BULRUSH MILLET IN THE SUDANESE-SAHELIAN ZONE OF NIGER
Authors: Boukary Ibrahim Baoua , Tourneur Jean-Claude , Gingras Jean
Published: November 2009

The reproduction of Forficula senegalensis Serv. was studied in fields of bulrush millet (Pennisetum typhoides Burm.), 40 km south of Maradi, Niger. Flight activity, as determined by light trapping, follows a seasonal cycle in two phases: first the arrival of adults of the previous year in the fields at the onset of tillering; and second, the dispersal of adults of the new generation at the time of blooming and maturation of the plant, and their departure at harvest time. Females lay their eggs at the collar of the plants during tillering; hatching and nymphal dispersal occur soon afterward. From the second instar on, nymphs migrate to the intermediate and upper levels of the plant. The reproductive cycle of F. senegalensis thus appears closely synchronized with the development of bulrush millet.
INVITATION PAPER: C.P. Alexander Fund: HOST CHOICE BY APHIDIID PARASITOIDS (HYMENOPTERA: APHIDIIDAE): HOST RECOGNITION, HOST QUALITY, AND HOST VALUE
Authors: Mackauer M. , Michaud J.P. , Völkl W.
Published: November 2009

Species in the family Aphidiidae (Hymenoptera) parasitize exclusively ovoviviparous aphids. Females use a variety of information to detect and evaluate suitable hosts. Olfactory cues associated with aphids, or the aphids’ host plant, are important for host location. Visual cues including aphid colour, shape, and movement can be evaluated from a distance without physical contact; aphid movement may act as a releasing stimulus for attack. Contact chemosensory cues (gustatory cues) are evaluated by antennation of the host cuticle and during ovipositor probing. A potential host must conform to the wasp’s response profile and satisfy minimum physiological and dietary requirements for immature development and growth. Host quality is determined in part by attributes specific to each aphid species and in part by each aphid’s individual-specific growth potential. Host quality for male and female progeny may vary as a result of different patterns of resource allocation and sexual size dimorphism. For an encountered aphid to be accepted as a host, its perceived value must exceed the wasp’s response threshold for oviposition. Host value, as opposed to host quality, varies dynamically with parasitoid state variables such as age, egg load, and prior experience. A conceptual model of host choice by aphidiid wasps is presented.
TRANSMISSION OF THE PITCH CANKER FUNGUS, FUSARIUM SUBGLUTINANS F. SP. PINI, TO MONTEREY PINE, PINUS RADIATA, BY CONE- AND TWIG-INFESTING BEETLES
Authors: Hoover Kelli , Wood David L. , Storer Andrew J. , Fox Joseph W. , Bros William E.
Published: November 2009

Conophthorus radiatae Hopkins, Ernobius punctulatus Fall, and Pityophthorus spp. infest cones and twigs of Monterey pines (Pinus radiata D. Don) and thus may be important vectors of the pitch canker fungus Fusarium subglutinans f. sp. pini in the central coast of California. Fifteen percent of 1st-year Monterey pine conelets infested with C. radiatae prior to August 1990 developed pitch canker by May 1991. Conophthorus radiatae, E. punctulatus, and Pityophthorus spp. were dissected from some of these conelets and found carrying F. s. pini. Between June 1990 and May 1991, 16% of 695 randomly selected uninfested 1st-year conelets from a total of 329 separate cone whorls were infested by at least one of the above beetle species, and F. s. pini was isolated from 42% of the attacked conelets. Average percentage contamination of beetles per conelet was highest for adults of Pityophthorus spp. (38%), followed by adults of C. radiatae (33%), larvae of E. punctulatus (24%), and larvae of Pityophthorus spp. (5%). There were significant associations between conelets that contained contaminated C. radiatae, Pityophthorus spp., and/or E. punctulatus and conelets with F. s. pini.

Under experimental conditions, C. radiatae and E. punctulatus transmitted the fungus to healthy cones. Ernobius punctulatus required an entrance tunnel by C. radiatae to enter and infect the cone. Artificially wounded cones did not develop pitch canker. Intra- and interspecific transmission of F. s. pini was demonstrated among these beetle species. In infested branch tips without cones, interspecific transmission of F. s. pini between E. punctulatus and Pityophthorus spp. was also demonstrated.

The roles of C. radiatae and E. punctulatus as vectors of F. s. pini and of Pityophthorus spp. as potential vectors are discussed in relation to the epidemiology of pitch canker disease. The spread of pitch canker to California’s native pines as well as other conifers may be enhanced by interspecific transmission of F. s. pini between E. punctulatus and C. radiatae in cones and between E. punctulatus and Pityophthorus spp. in branch tips. Ernobius punctulatus provides a pathway for the fungus to potential insect vectors that attack several hosts and a variety of plant parts.
PATHOGENICITY OF ASCOSPHAERA LARVIS TO LARVAE OF THE ALFALFA LEAFCUTTING BEE, MEGACHILE ROTUNDATA
Authors: Goettel Mark S. , Duke Grant M. , Goerzen D. Wayne
Published: November 2009

Laboratory assays and field surveys showed that Ascosphaera larvis (Bissett) is a pathogen of alfalfa leafcutting bee larvae, capable of causing high mortality in commercial populations. In one population, over 21% of bees were found to be infected by A. larvis. However, overall levels of the disease are low and it is unlikely that this pathogen poses an immediate threat to commercial leafcutting bee populations in Canada. The LD50 was determined to be 1.9 × 105 spores/bee. Elevated levels of CO2 are required for in vitro spore germination. The disease can easily be diagnosed within bee cells by X-ray radiography, thereby enabling disease levels to be monitored using conventional methods utilized by the industry to monitor leafcutting bee quality.
ASSESSING NATURAL SELECTION IN WHITE PINE WEEVILS (PISSODES STROBI PECK) (COLEOPTERA: CURCULIONIDAE) FOR OVERCOMING RESISTANCE IN TREES: AN EVOLUTIONARY MODEL
Authors: Barclay Hugh J.
Published: November 2009

An evolutionary model was constructed for the white pine weevil (Pissodes strobi Peck). This weevil attacks Sitka spruce [Picea sitchensis (Bongard) Carriere], and Sitka spruce trees have two forms, one being susceptible to the insect attacks and the other being resistant to attack. There is a fear that insects may develop tolerance to the resistant trees. The strategy of interplanting susceptible and resistant trees to minimize the likelihood of the insects developing tolerance mechanisms to circumvent the resistance is examined. It is found that if only one gene locus is involved, the development of tolerance occurs more quickly than if resistance is governed by two independent loci. The rate of evolution of tolerance to tree resistance is retarded by increased adult survivorship, the degree of recessiveness of the gene, preferential attack of susceptible trees, redistribution of intolerant insects from resistant to susceptible trees, and the immigration of wild-type insects.
VULNERABILITY OF THE FIR CONEWORM, DIORYCTRIAABIETIVORELLA (GROTE) (LEPIDOPTERA: PYRALIDAE), IN DIFFERENT LARVAL STAGES TO THE HD-1 STRAIN OF BACILLUS THURINGIENSIS
Authors: Trudel Richard , Bauce Éric , Cabana Jean , Guertin Claude
Published: November 2009

The fir coneworm, Dioryctria abietivorella (Grote), is a major insect pest in seed orchards across Canada and the adjoining eastern and western United States. Larvae feed principally on cones, but they can also feed on needles and occasionally on the bark of young tree trunks (Hedlin et al. 1980; Ruth 1980; Martineau 1985). The potential for a population of D. abietivorella to build up in seed orchards may be greater than in natural stands (Hedlin et al. 1980; Ruth et al. 1982). The use of entomopathogen in the management of fir coneworm could be an adequate measure to reduce the impact of this insect. Moreover, Bacillus thuringiensis ssp. kurstaki has a specific effect on Lepidoptera (Aronson et al. 1986; Gill et al. 1992). The purpose of our study was to determine the activity of the HD-1 strain of B. thuringiensis ssp. kurstaki (serotype H-3a:3b) to larvae D. abietivorella. Bioassays were conducted with first-, third-, and fifth-instar larvae of fir coneworm to determine whether or not the insect's vulnerability to B. thuringiensis varies with larval age.
EFFECT ON GROWTH AND ROOT NODULATION OF CLOVERS, TRIFOLIUM SPP., BY GALLERIA MELLONELLA (L.) (LEPIDOPTERA: PYRALIDAE) INFECTED WITH STEINERNEMA CARPOCAPSAE (WEISER) (RHABDITA: STEINERNEMATIDAE) AND ITS SYMBIONT, XENORHABDUS NEMATOPHILUS POINAR AND THOMAS
Authors: Eidt D.C. , Stewart J.G.
Published: November 2009

Red and white clovers, Trifolium spp., were grown in nitrogen-poor soil containing cadavers of larval Galleria mellonella (L.) that were infected with Steinernema carpocapsae (Weiser) and its symbiont Xenorhabdus nematophilus Poinar and Thomas. Growth and root nodulation were not affected by the nematode treatment, leading us to conclude that they would not be impaired through the action of antimicrobial agents produced by Xenorhabdus spp. present in soils because of Xenorhabdus-infected insect cadavers.
THE FUNCTIONAL RESPONSE AND PREY PREFERENCE OF FELTIELLA ACARISUGA (VALLOT) (DIPTERA: CECIDOMYIIDAE) FOR TWO OF ITS PREY: MALE AND FEMALE TWOSPOTTED SPIDER MITES, TETRANYCHUS URTICAE KOCH (ACARI: TETRANYCHIIDAE)
Authors: Opit G.P. , Roitberg B. , Gillespie D.R.
Published: November 2009

The preference of the predatory midge, Feltiella acarisuga (Vallot), for adult male and female twospotted spider mite, Tetranychus urticae Koch, was examined using functional response models. The midge exhibited a type-II functional response to each prey. Handling time was estimated to be much higher for the female mites than for the males (1.52 vs. 0.40 h). Estimated instantaneous search rates for the female and male mites were similar (1.32 vs. 1.28). A preference index of 1.03 was calculated using the ratio of the instantaneous search rates. Feltiella acarisuga was found to exhibit no preference for either female or male mites; when both prey were present in equal numbers, midge larvae killed as many females as males.
BEHAVIOR OF FEMALE ERETMOCERUS SP. NR. CALIFORNICUS HOWARD (APHELINIDAE: HYMENOPTERA) ATTACKING BEMISIA ARGENTIFOLII BELLOWS AND PERRING (ALEYRODIDAE: HOMOPTERA) ON TWO NATIVE CALIFORNIAN WEEDS
Authors: Headrick David H. , Bellows Thomas S. , Perring Thomas M.
Published: November 2009

Searching and ovipositional behaviors by female Eretmocems sp. nr. californicus Howard on Bemisia argentifolii Bellows and Perring infesting velvetleaf, Abutilon theophrasti Medic. (Malavaceae), and telegraph weed, Heterotheca grandiflora Nutt. (Asteraceae), were quantified. Adult female behaviors were described and quantified for E. sp. nr. californicus to establish a behavioral time budget analysis. Females departed from leaves of A. theophrasti in 83.3% of the trials, and of those that remained and searched for hosts, walking speeds averaged 0.29 mm/s. Females departed from the leaves of H. grandiflora in 44.4% of the trials, and those remaining readily searched for whitefly hosts with walking speeds averaging 0.26 mm/s. The duration of host assessment by antennation was related to subsequent behaviors; rejecting a host was a shorter process than accepting it for further evaluation irrespective of plant species or nymphal stage. Evidence for a behavioral preference for oviposition under early nymphal instars was documented for female E. sp. nr. californicus on both plant species. Oviposition efficiency in 1-h laboratory trials for nymphs on A. theophrasti was 30% and efficiency on H. grandiflora was 23%. Females spent 61.9 and 53.3% of their total time in searching, host assessment, probing, and oviposition while on A. theophrasti and H. grandiflora, respectively. The remainder of the time was spent grooming, resting, and host feeding, except host feeding on A. theophrasti was not observed. Implications of this study for silverleaf whitefly management through conservation and augmentation of native flora and fauna are discussed.
EFFECTIVENESS OF THE SECOND MATING IN A BISEXUALTRICHOGRAMMASPECIES AND THE FIRST MATING IN A THELYTOKOUSTRICHOGRAMMASPECIES (HYMENOPTERA: TRICHOGRAMMATIDAE)
Authors: Pintureau Bernard , Iglesias Calvin M. Del Pilar , Grenier Simon
Published: November 2009

A chromatic mutation, dark body (mutants with a darker body than wild individuals), allowed us to test the effectiveness of the second mating in the bisexual speciesTrichogramma turkestanicaMeyer, and of the first mating in the thelytokous speciesT.cordubensisVargas and Cabello. Second mating inT.turkestanicawas mostly efficient (i.e. followed by fertilization). Nevertheless, the latency before the second mating was longer as the time between second and first matings increased. The utilization of the spermatozoa from the second mating increased as the stock of spermatozoa from the first mating decreased. A long time in the presence of a male was necessary to obtain mating of the thelytokous females ofT.cordubensis. Such fertilized females produced a low percentage (28%) of daughters from bisexual reproduction.
RESPONSES OF LARVAL CHORISTONEURA ROSACEANA (HARRIS) (LEPIDOPTERA: TORTRICIDAE) TO A FEEDING STIMULANT
Authors: Li S.Y. , Fitzpatrick S.M.
Published: November 2009

The commercial feeding stimulant Pheast® was tested in the laboratory to determine its attractive and phagostimulatory effects on larval Choristoneura rosaceana (Harris). In choice experiments, larvae were attracted initially to filter paper discs treated with Pheast, but did not remain on or near treated discs. Larvae were not attracted initially to raspberry leaf discs treated with Pheast, but were more likely to stay near treated leaf discs than water-dipped ones. Larvae were neither attracted to nor arrested on whole raspberry leaves treated with Pheast. In no-choice experiments, larvae fed Pheast-treated leaves consumed more leaf tissue than, and grew almost twice as quickly as, larvae fed leaves dipped in water. When larvae were fed leaves treated with Dipel WP (Bacillus thuringiensis var. kurstaki) plus 5% Pheast, the mortality was 93% greater than that of larvae fed leaves treated with Dipel WP alone. These results suggest that Pheast has potential to enhance efficacy of B. thuringiensis against C. rosaceana on raspberries in the field.
THE ADVANTAGE OF SHORT TONGUES IN BUMBLE BEES (BOMBUS) — ANALYSES OF SPECIES DISTRIBUTIONS ACCORDING TO FLOWER COROLLA DEPTH, AND OF WORKING SPEEDS ON WHITE CLOVER
Authors: Plowright C.M.S. , Plowright R.C.
Published: November 2009

Four surveys of Bombus workers found on various flower species generated classifications of bumble bees according to tongue length and corolla depth of flower species. The long-tongued bees frequented species with long corollas and short-tongued bees frequented species with short corollas. Within-species analyses revealed several significant positive correlations between tongue length and corolla depth. The advantage of short tongues in bumble bees was investigated in an analysis of working speeds of different species on white clover, which has a short corolla. Bees with short tongues were more efficient than bees with long tongues.
DEVELOPMENT AND REPRODUCTION OF THANASIMUS FORMICARIUS (L.) (COLEOPTERA: CLERIDAE) AT THREE CONSTANT TEMPERATURES
Authors: Hui Ye , Bakke Alf
Published: November 2009

Thanasimus formicarius (L.), a main predator of bark beetles in Eurasia, was studied at constant temperatures of 15, 21, and 25 °C. Morphological data and duration of development are indicated for the egg (2.4 by 0.8 mm; 28–7 days at temperatures from 15 to 25 °C), three larval instars (9–14 days depending on instar and temperatures of 21 and 25 °C), pupa (15 and 33.5 days over the range of temperatures), and adult. Information is also given on head capsule size, sex ratio, fecundity, and length of adult life.
ESTABLISHMENT, DISTRIBUTION, AND IMPACT IN SOUTHERN NEW ENGLAND OF LATHROLESTES NIGRICOLLIS (THOMPSON) (HYMENOPTERA: ICHNEUMONIDAE), AN INTRODUCED PARASITOID OF THE BIRCH LEAFMINER, FENUSA PUSILLA (LEPELETIER) (HYMENOPTERA: TENTHREDINIDAE)
Authors: Van Driesche R.G. , Childs R. , Casagrande R.A. , Tewksbury L.
Published: November 2009

Lathrolestes nigricollis (Thompson) (Hymenoptera: Ichneumonidae) was released in New England against Fenusa pusilla (Lepeletier) in 1979–1980 and again in 1989–1990. By 1991, the parasitoid was widely established in southern New England. From 1979 to 1990 the commonness of leafminers at the original release site in the first generation declined from 50–54% of leaves mined to under 3%. Over 4 years at five sites, parasitism of larval birch leafminers increased between leafminer generations from 10.3% (G1) to 27.6% (G2) to 39.2% (G3). In Massachusetts, parasitism decreased (from 28 to 14%) with increasing distance from the original release site, while corresponding damage increased (from 6% of leaves mined to 33%). In areas local to the original release site (<4 km) parasitism has reduced damage from birch leafminer to inconsequential levels. Some sites in other parts of southern New England, particularly roadside sites, still have high levels of mined leaves in spite of the parasitoid’s presence in the general area.
SEXUAL DIMORPHISM IN THE SWEET POTATO WEEVIL,CYLAS FORMICARIUS(F.) (COLEOPTERA: BRENTIDAE)
Authors: Starr Christopher K. , Wilson David D. , Severson Ray F. , Kays Stanley J.
Published: November 2009

Cylas formicarius(F.) shows a strong overall sexual monomorophism, with external differences noted in only three organs: (a) relative size of the hind wings; (b) form of the antennal club and numbers of its different types of sensillum; and (c) size of the compound eyes and their individual facets. We relate these to known or predicted behavioural differences. Eye dimorphism is used to test a theoretical rule on the relationship between differences in overall eye size and in the size of individual ommatidia. Some sexually monomorphic features are briefly discussed, including two types of putatively sensory hairs not found on the antennae.
FOLIAR AND SYSTEMIC APPLICATIONS OF NEEM SEED EXTRACT FOR CONTROL OF SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.) (LEPIDOPTERA: TORTRICIDAE), INFESTING BLACK AND WHITE SPRUCE SEED ORCHARDS
Authors: Wanner Kevin W. , Helson Blair V. , Kostyk Barry C.
Published: November 2009

Neem seed extract (20, 60, and 180 ppm azadirachtin) applied to the crowns of black spruce trees immediately prior to female reproductive bud flush, resulted in high mortality of early instar spruce budworm larvae. Dose-dependent reductions of 40–93%, as compared with check trees, were observed 2 and 4.5 weeks after treatment. Seed cone protection from grazing damage, however, was moderate; at 60 ppm azadirachtin, the incidence of cone grazing was reduced 29%, and the proportion of severely grazed cones reduced 39%, as compared with check trees. Larval mortality and bud damage observed in the laboratory corroborated field results. High toxicity to second-instar larvae, and performance during adverse weather conditions, supports the potential of neem seed extract for control of spruce budworm defoliation. However, both laboratory and field results indicate that feeding occurs before the effects of neem seed extract manifest, resulting in moderate protection of cones. Whereas foliage can tolerate low levels of feeding, female strobili are damaged significantly. Excellent protection of foliage was achieved from systemic injections of neem seed extract to white and black spruce trees (1.5 g azadirachtin/tree). Neem seed extract, formulated for systemic application, could provide a botanical alternative for control of forest pests in urban environments.
EVIDENCE FOR AN AIRBORNE SEX PHEROMONE IN THE COLORADO POTATO BEETLE, LEPTINOTARSA DECEMLINEATA
Authors: Edwards M.A. , Seabrook W.D.
Published: November 2009

Trials using four different sex combinations of Colorado potato beetle, Leptinotarsa decemlineata Say, demonstrated that male beetles move upwind towards females, whereas no attraction was seen between any of the other combinations. Attraction was not found to increase significantly after the female reached 10 days old. Visual stimuli appear to be unimportant from a distance of 50 cm. Orientation behaviour by the male beetle was observed as it walked upwind towards the female; no identifiable calling behaviour by the female was observed. The data indicate a sex pheromone is being produced by the female and is used by the male for mate location from a distance.
RUBROGRYLLUS COLORATUS, A NEW CRICKET GENUS AND SPECIES (GRYLLOPTERA: GRYLLIDAE: GRYLLINAE) FROM BAJA CALIFORNIA, MEXICO
Authors: Vickery Vernon R.
Published: November 2009

A new genus and species of grylline cricket are described from Baja California, Mexico. This cricket, unlike most others, is reddish in colour.
OBLIGATE THELYTOKY IN ORIBATID MITES: NO EVIDENCE FORWOLBACHIAINDUCEMENT
Authors: Perrot-Minnot Marie-Jeanne , Norton Roy A.
Published: November 2009

The wide distribution of obligate thelytoky in oribatid mites (Acari: Oribatida) raises the question of the mechanisms that allowed genetic diversity to be maintained or even promoted in these taxa. We tested whether or not endosymbiotic bacteriaWolbachiaare associated with thelytoky in eight species of oribatid mites (as it is for most thelytokous parasitic Hymenoptera studied so far) by using a polymerase chain reaction assay. Our negative results in the selective amplification ofWolbachiaDNA suggest that these bacteria are not responsible for the thelytokous mode of reproduction of oribatid mites. On the basis of known or suspected cytogenetic mechanisms in oribatid mites (automictic thelytoky, inverted meiosis), we discuss an alternative hypothesis for the inducement of thelytoky, and its relevance to the observed diversification of thelytokous oribatid mites over evolutionary time.
ROOSTING, PERCHING, AND HABITAT SELECTION INARGIA VIVIDAHAGEN ANDAMPHIAGRION ABBREVIATUM(SELYS) (ODONATA: COENAGRIONIDAE), TWO DAMSELFLIES INHABITING GEOTHERMAL SPRINGS
Authors: Pritchard Gordon , Kortello Andrea
Published: November 2009

AlthoughAmphiagrion abbreviatum(Selys) andArgia vividaHagen often occur at the same geothermally heated springs in western Canada and the United States, they differ markedly in their abundance at any particular site. There is no relationship between crude data on water temperature, conductivity, or aquatic vegetation and the relative abundance of the two species, but there is a striking correlation with presence or absence of trees. The absence ofA. abbreviatumfrom heavily treed areas is associated with the paucity of suitable daytime perching sites, and there may be competitive pressure exerted byA. vividafor the perching sites that are available.Argia vividadoes not live at open sites because it requires trees for night-time roosts.Argia vividaroosted higher thanA. abbreviatumin cages and held the body at a greater angle from the cage wall. The roosting posture ofA. vividais probably related to interception of solar radiation in the morning, and the body positions of both species possibly provide defence against predation.
DEVELOPMENT OF ADULT AND NYMPHAL POPULATIONS OF LYGUS LINEOLARIS (PALISOT DE BEAUVOIS), L. ELISUS VAN DUZEE, AND L. BOREALIS (KELTON) (HETEROPTERA: MIRIDAE) IN RELATION TO SEEDING DATE AND STAGE OF PLANT DEVELOPMENT ON CANOLA (BRASSICACEAE) IN SOUTHERN MANITOBA
Authors: Leferink J.H.M. , Gerber G.H.
Published: November 2009

The development of adult and nymphal populations of Lygus lineolaris (Palisot de Beauvois), L. elisus Van Duzee, and L. borealis (Kelton) was studied in relation to seeding date and stage of plant development in four seedings of canola (cv. Westar) in field plots at Glenlea, Manitoba, in 1988 and 1989. Lygus lineolaris was the dominant species in all seedings and in both years. Colonizing adults (first-generation adults) of the three Lygus spp. first invaded the plots at about the same time from the late rosette to the early flowering stages of plant development, and Lygus adult numbers reached maxima during flowering in all seedings. The stage of plant development, and not seeding date, was important in attracting colonizing adults of Lygus to canola. Second-generation nymphs first appeared at the flowering stage of canola. All nymphal instars reached maxima and median abundances during the late flowering and pod development stages in all seedings. Second-generation adults were present from early to late pod development stages. Median abundances of second-generation adults of L. lineolaris, L. elisus, and L. borealis usually were reached at the same plant growth stage in each seeding.
FORECASTING PHENOLOGY OF ORTHOSIA HIBISCI GUENÉE (LEPIDOPTERA: NOCTUIDAE) IN BRITISH COLUMBIA USING SEX-ATTRACTANT TRAPS AND DEGREE-DAY MODELS
Authors: Judd Gary J.R. , Gardiner Mark G.T.
Published: November 2009

Emergence, oviposition, and seasonal flight activity of adult, speckled green fruit worm, Orthosia hibisci Guenée (Lepidoptera: Noctuidae), were monitored during 1991 and 1992 in a mixed block of McIntosh and Spartan apple trees at Summerland, British Columbia, to establish relationships between the phenology of these events and degree-days (DD). Using air temperatures and a developmental threshold of 3 °C, median emergence of males was predicted most accurately (0–2 days) by starting DD summations on 1 March. Median emergence of females was predicted without error when first catch of a male in a trap baited with sex attractant was used as a population reference point (biofix) to start DD summation. Using a threshold temperature of 3 °C, observed cumulative emergence of females reached 50% at 63.5 ± 4.05 DD3 °C after biofix, similar to the laboratory-derived prediction of 61.3 ± 4.2 DD with a threshold temperature of 2.8 °C. Catches of males with sex attractant preceded oviposition, but female catches in light traps lagged behind oviposition, suggesting older females were being caught in light traps. The oviposition curve was linear and parallel to the cumulative curve of male catches with sex attractant. Oviposition began at 26.7 DD3 °C and reached 50% at 94.2 DD3 °C after biofix, respectively. Weibull equations fitted to observed cumulative catches with sex attractant, female emergence, and oviposition, combined with laboratory-derived DD models of egg and larval development, were used to predict phenology of O. hibisci and correlate it with flowering phenology of pome fruits. This study provides a basis for timing application of selective insecticides against O. hibisci based on first catch in a sex-attractant trap and DD summations.
A TECHNIQUE FOR MEASURING AND MARKING LIVE FLIES
Authors: Bonduriansky Russell , Brooks Ronald J.
Published: November 2009

We designed a simple device for physically restraining live Diptera for measurement and marking. This new technique does not involve powders, anaesthetics, or handling with fingers or forceps, and can be adapted for use with flies of any size. We tested it on acalyptrate flies of 1.5–3.0 mm body length, and were able to sex, measure, and mark them with individual codes (enamel paint applied to the thoracic notum) in 5–7 min per fly, with a 96% success rate. This technique may be applicable to a range of behavioural and ecological research.
SURVIVAL AND MULTIPLICATION OF STORED-PRODUCT BEETLES AT SIMULATED AND ACTUAL WINTER TEMPERATURES
Authors: Fields P.G. , White N.D.G.
Published: November 2009

Cryptolestes ferrugineus (Stephens), Cryptolestes pusillus (Schönherr), Tribolium castaneum (Herbst), and Rhyzopertha dominica (Fabricius) were gradually exposed to falling temperatures in the laboratory, simulating conditions in the centre of a 12- or 6-m-diameter granary containing wheat. Two years of overwintering mortality for C. ferrugineus and R. dominica were obtained from 11–13 farm granaries (40–100 t wheat). Cryptolestes ferrugineus (adults) was the most cold hardy species among the beetles tested. In the laboratory, survival was 40% at 25 °C declining to 10 °C over10 months, whereas at 25 °C declining to 0 °C over 10 months survival was 7%. Cryptolestes pusillus and T. castaneum did not survive once temperatures were below 10 °C, and R. dominica adults did not survive temperatures below 3 °C. In the field, there was no survival of C. ferrugineus in granaries that had February temperatures of −6.7 °C or lower. Six-week exposure to −10 °C killed most C. ferrugineus adults taken from granaries in February. Cryptolestes ferrugineus caught in granaries were more cold hardy than laboratory-reared strains. No T. castaneum or R. dominica survived an entire winter in granaries in the 2 years tested. Although C. pusillus was not tested in the granaries, it is unlikely it could survive the winter, as it had the same level of cold tolerance as T. castaneum in the laboratory. The implications for the population dynamics of these pest species in prairie grain are discussed.
INSECTS ASSOCIATED WITH PURPLE LOOSESTRIFE, LYTHRUM SAUCARIA L., IN SOUTHERN MANITOBA.
Authors: Diehl Jason K. , Holliday N.J. , Lindgren C.J. , Roughley R.E.
Published: November 2009

In 1994 and 1995 insects were collected from several sites in southern Manitoba, where purple loosestrife, Lythrum salicaria L., is dominant. Collection techniques included the use of trap plants, sweep netting, vacuum sampling, and hand collecting. Insects from 38 families were collected and grouped into four general feeding guilds: herbivores, predators, omnivores, and fungivores. Herbivores that directly fed on L. salicaria included Galerucella nymphaeae Linné (Coleoptera: Chrysomelidae), Myzus lythri (Schrank) (Homoptera: Aphididae), Poecilocapsus lineatus (Fabricius) (Hemiptera: Miridae), Kleidocerys resedae (Panzer) (Hemiptera: Lygaeidae), Ametastegia glabrata (Fallén) (Hymenoptera: Tenthredinidae), Orgyia leucostigma (Smith) (Lepidoptera: Lymantriidae), Lophocampa maculata (Harris) (Lepidoptera: Lymantriidae), Spilosoma virginica (Fabricius) (Lepidoptera: Arctiidae), Simyra henrici (Grote) (Lepidoptera: Noctuidae), Dichomeris ligulella (Hübner) (Lepidoptera: Gelechiidae), Melanchrapicta (Harris) (Lepidoptera: Noctuidae), Hyles galli (Rottenburg) (Lepidoptera: Sphingidae), and Biston betularia cognataria (Gn) (Lepidoptera: Geometridae). These herbivores cannot severely limit the density of purple loosestrife in southern Manitoba and any interactions with the introduced agents should be minimal. The predatory stink bug, Apoecilus bracteatus Fitch (Hemiptera: Pentatomidae), was identified as a potentially important predator of the introduced biological control agents, Galerucella pusilla Duftschmidt and Galerucella calmariensis (L.) (Coleoptera: Chrysomelidae).
DESCRIPTION OF THREE NEWANAPHESSPECIES (HYMENOPTERA: MYMARIDAE), EGG PARASITOIDS OF THE CARROT WEEVIL,LISTRONOTUS OREGONENSIS(LECONTE) (COLEOPTERA: CURCULIONIDAE), AND REDESCRIPTION OFANAPHES SORDIDATUSGIRAULT
Authors: Huber John T. , Côté Sylvain , Boivin Guy
Published: November 2009

Three new mymarid egg parasitoids of the carrot weevil,Listronotus oregonensis(LeConte) (Coleoptera: Curculionidae), are described:Anaphes coteiHuber from Nova Scotia;Anaphes listronotiHuber from Quebec; andAnaphes victusHuber from Quebec, Michigan, and Texas. A key to the species is given.Anaphes sorditatus(Girault), with which at least one of the new species was previously confused, is redescribed. Althoughlistronotiandsorditatuscannot presently be distinguished morphologically, they are biologically distinct and have different hosts. Crosses between malesordidatusand femalevictusyielded female offspring in 27% of the tests but none in the reciprocal crosses. The corresponding control crosses resulted in 90 and 30% female offspring. Mating did not occur in attempts to crosssordidatuswithlistronoti. On three occasions an unidentified species ofAnagruswas reared from field-collected carrot weevil eggs. This represents the first report of anAnagrusspecies from Curculionidae.
GEOGRAPHIC INCIDENCE AND DAMAGE LEVELS OF ALFALFA SEED CHALCID, BRUCHOPHAGUS RODDI (HYMENOPTERA: EURYTOMIDAE), IN SASKATCHEWAN, AND ITS RELATIONSHIP TO WEATHER AND AGRONOMIC VARIABLES AND PRODUCTION PRACTICES
Authors: Soroka Juliana J. , Spurr D.T.
Published: November 2009

A 5-year survey of Saskatchewan alfalfa (Medicago sativa L. sensu lato) seed fields was undertaken to determine the level of infestation by the alfalfa seed chalcid, Bruchophagus roddi (Gussakovsky). Seed samples were taken from commercial seed fields, hay fields, and roadsides just before pod maturity. From sample lots of 250 pods, the numbers of healthy, chalcid-damaged, and frozen or immature seed were determined. Later, producers were questioned about the attributes of and management practices employed in their fields. Seed yields and infestation levels were correlated with temperature, precipitation, and degree-day data from the year of and the year preceding seed collection. Alfalfa seed chalcid infestation level was correlated most closely with the temperature and rainfall in July and August of both years. The proportion of damaged seed was highest the year following warm, dry summers. Alfalfa cultivar also influenced infestation levels; winter-hardy cultivars that became dormant early in the autumn had lower levels of chalcid-damaged seeds than less hardy cultivars which maintained growth later in the season. Management practices such as the use of insecticides (for plant bug and aphid control), fertilizers, and herbicides, size or age of field, soil type, and application of irrigation water did not affect the proportion of seeds injured by chalcids.
INSECTS AND TEMPERATURE—FURTHER EVIDENCE
Authors: Gilbert N. , Raworth D.A.
Published: November 2009

Pieris rapae (L.) (Lepidoptera: Pieridae) is endemic in the Canary Islands, presumably since Roman times. Average temperatures at sea level on Tenerife and La Gomera range from 17°C at midwinter to 25°C in summer. If the argument of Gilbert and Raworth (1996) is correct, we might expect the development threshold of P. rapae in the Canaries to be 17°C, much higher than the 10°C observed elsewhere: Cambridge, U.K.; Cordoba, Spain; Pompei, Italy; Montpellier, France; Vancouver, Canada; and Canberra, Australia (Gilbert 1988).
RESISTANCE TO INSECTICIDES IN ORIENTAL FRUIT MOTH POPULATIONS (GRAPHOLITA MOLESTA) FROM THE NIAGARA PENINSULA OF ONTARIO
Authors: Pree D.J. , Whitty K.J. , Driel L. Van , Walker G.M.
Published: November 2009

After about 20 years of wide usage in integrated pest management (IPM) programs on peach in the Niagara Peninsula of Ontario, populations of Oriental fruit moth, Grapholita molesta (Busck), resistant to azinphosmethyl and phosmet have been selected. Resistance, as expressed in first-instar larvae, was only two- to four-fold to azinphosmethyl or phosmet, but up to 45% fruit infestations have been documented in commercial blocks. Resistance to azinphosmethyl was not well expressed in adult Oriental fruit moths. In tests with larvae, cross-resistance occurred to most other organophosphorus insecticides except acephate and chlorpyrifos. Acephate was more toxic to resistant than to susceptible larvae. Resistance was higher (> 100-fold) to the methyl carbamates carbaryl and carbofuran but was approximately fivefold to the carbamoyl oxime methomyl. Cross-resistance to pyrethroids was not observed. Tests with field-collected material, either from crosses on mating trays in the field or from pupae collected in cardboard bands attached to trees, indicated that resistance was widespread across the Niagara production area but that the resistance was not uniformly expressed at all locations. Resistance was expressed in F1 larvae from crosses of susceptible females with field-collected males, indicating that the genetic change in resistant larvae was unlikely the effect of a single recessive gene. Field tests in replicated two-tree plots and in larger (0.25–0.6 ha) plots treated with up to five applications as a season-long control program indicated that neither chlorpyrifos nor acephate were as effective as a pyrethroid (deltamethrin). The sustainability of these IPM programs and potential resistance management strategies are discussed.
MORPHOLOGY, ONTOGENY, AND INTRASPECIFIC VARIABILITY OF THE YEW BIG BUD MITE,CECIDOPHYOPSIS PSILASPIS(ACARI: ERIOPHYIDAE)
Authors: Marshall Valin G. , Clayton Marilyn R. , Newsom Deanna N.
Published: November 2009

All ontogenetic stases of the yew big bud mite,Cecidophyopsis psilaspis(Nalepa), from British Columbia were studied by scanning electron and light microscopy and were compared with an English population of this species. The species was redescribed from the two populations, which were found to be quite similar in general appearance and in most of the morphometric data analyzed. Spermatophores in this species are similar to those observed in other Eriophyoidea. Details of a male spermatophoric organ are described and illustrated for the first time in an eriophyoid mite. Moulting inC.psilaspisis shown to be prodehiscent. The data reported here neither support nor reject the alternative hypothesis that the first active stase is larval versus nymphal. However, to account for the ontogenetic evidence, the first active stase is herein considered larval.
EFFECTS OF PHOTOPERIOD AND PREY TYPE ON DIAPAUSE TENDENCY AND PREOVIPOSITION PERIOD IN PERILLUS BIOCULATUS (HEMIPTERA: PENTATOMIDAE)
Authors: Horton David R. , Hinojosa Tonya , Olson Stacie R.
Published: November 2009

Attempts at using Perillus bioculatus (F.) for control of Colorado potato beetle, Leptinotarsa decemlineata (Say), have been hampered by an incomplete understanding of the predator’s over-wintering biology. This study determined the effects of photoperiod and life stage of prey (Colorado potato beetle) on tendency for adult females to enter reproductive diapause, duration of the preoviposition period, and mortality of females. Perillus bioculatus showed an increasing tendency to enter diapause rather than to initiate reproductive activities as day length decreased. Females that were fed large beetle larvae (mid to late fourth instar) showed a significant increase in the number of individuals entering diapause compared with females that were fed a mix of beetle eggs and small larvae (first to third instar). Probit analysis was used to estimate the photoperiod that caused 50% of females to enter diapause; these estimates were 15L:9D for females feeding on large larvae, and 14.5L:9.5D for females feeding on eggs and small larvae. Females that were fed large larvae also showed a longer preoviposition period and had a slightly significant higher rate of mortality than those fed eggs and small larvae.
RESISTANCE AGAINST WHITE PINE WEEVIL: EFFECTS ON WEEVIL REPRODUCTION AND HOST FINDING
Authors: Sahota T.S. , Manville J.F. , Peet F.G. , White E.E. , Ibaraki A.I. , Nault J.R.
Published: November 2009

Feeding on leaders of resistant Sitka spruce trees, Picea sitchensis (Bong.) Carr., Led to ovarian regression in white pine weevils, Pissodes strobi Peck., that contained already mature eggs at the time of caging on leaders. Such feeding also led to inhibition or a virtual blockage of ovarian development in weevils that did not contain already mature eggs at the time of caging. Ovarian maturation in such weevils was restored by application of juvenile hormone to female weevils. Effects of three levels of resistance were consistent within the experiments and with the field performance of the tested clones. These results indicate that the effects of resistance were postingestive, i.e., resistance was a form of antibiosis. How antibiosis can cause the weevils to concentrate oviposition on susceptible trees is discussed. Results also provide a means of selecting and ranking resistance of individual spruce trees for tree breeding and reforestation.
FEMALE CERATITIS CAPITATA (DIPTERA: TEPHRITIDAE) CAPTURE IN A DRY TRAP BAITED WITH A FOOD-BASED SYNTHETIC ATTRACTANT IN AN ARGAN FOREST IN MOROCCO. PART I: LOW POPULATION FIELD TEST
Authors: Bakri A. , Hadis H. , Epsky N.D. , Heath R.R. , Hendrichs J.
Published: November 2009

Field tests were conducted in an argan forest in Morocco to evaluate the performance of a cylindrical dry trap and food-based synthetic attractant (FA) for monitoring the Mediterranean fruit fly (medfly), Ceratitis capitata (Weidemann). This female-targeted trapping system was compared with Jackson traps baited with trimedlure (TML), a male-targeted trapping system. TML-baited traps attracted significantly more males than FA-baited traps (91.4 ± 13.01 and 5.0 ± 0.75 males, respectively), and the FA-baited traps captured significantly more females than did TML-baited traps (9.3 ± 1.93 and 0.1 ± 0.04 females, respectively). For the first month of the field trial, the ratio of mature females to immature females captured in the FA-baited traps was approximately equal, but more immature females were captured in the second month. FA-baited traps were less specific and captured significantly more nontarget flies than did TML-baited traps.
BIOLOGY OF THE GALLERDIPLOLEPIS ROSAEFOLII(HYMENOPTERA: CYNIPIDAE), ITS ASSOCIATED COMPONENT COMMUNITY, AND HOST SHIFT TO THE SHRUB ROSE THÉRÈSE BUGNET
Authors: Shorthouse Joseph D. , Brooks Scott E.
Published: November 2009

Diplolepis rosaefolii(Cockerell) induces a lenticular gall on the leaves of various roses across Canada. In Ontario and Quebec,D.rosaefoliiis found only onRosa acicularisLindl., and its galls are inhabited by eight species of parasitoids, the most common beingChrysocharis pentheus(Walker),Orthopelma luteolator(Gravenhorst), andEupelmus dryorhizoxeniAshmead. Parasitoids and the inquilinePericlistussp. make up 48–62% of gall inhabitants. Here we report a population ofD.rosaefoliion the hybrid rugosa shrub rose Thérèse Bugnet in a field of experimental roses in Quebec. Only two species of parasitoids and one specimen ofPericlistussp. were associated with these galls.
FEEDING PREFERENCES OF PHYLLOTRETA CRUCIFERAE (COLEOPTERA: CHRYSOMELIDAE) FOR WILTED AND NONWILTED CRUCIFER SEEDLINGS
Authors: Palaniswamy P. , Matheson F. , Lamb R.J.
Published: November 2009

Water stress, especially wilting, can increase the susceptibility of plants to herbivory by insects (Holtzer et al. 1988). Insects as diverse as locusts and leaf-cutting ants prefer wilted foliage (Bernays and Lewis 1986; Vasconcelos and Cherrett 1996). Palaniswamy et al. (1997) observed that the crucifer flea beetle, Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae), fed on excised and wilted foliage of Thlaspi arvense L. (Cruciferae) but not on intact and turgid foliage. If water stress can make unpalatable plants more palatable, identifying robust resistance to pests such as flea beetles will be difficult. The purpose of this study was to determine whether wilting affects feeding by the crucifer flea beetle and in particular if wilting differentially affects feeding on preferred and nonpreferred plants.
COPULATION AND OVIPOSITION BEHAVIOUR OFPROTOPIOPHILA LITIGATA(DIPTERA: PIOPHILIDAE)
Authors: Bonduriansky Russell , Brooks Ronald J.
Published: November 2009

Using field and laboratory (stereoscope) observations, we investigated copulation and oviposition behaviours ofProtopiophila litigataBonduriansky, which mates and oviposits exclusively on discarded cervid antlers. Typically, a male leapt onto a female, briefly tapped the sides of her abdomen with his legs, then stimulated her abdominal tip with his tarsi, parameres, and gonopods until she extended her genitalia (~4 min), after which the pair established genital lock (~10 min). Meanwhile, the female emigrated to a part of the antler where density of single males was lower. Following sperm transfer (~87 min) and genital separation (~5 min), the female deposited and ingested two droplets containing spermatozoa (~6 min). Then she oviposited (~29 min) into cracks or pores in the antler’s surface while the male remained in tandem and pushed away single males with his wings. Males often wrestled for possession of females, but take-overs were rare. Whereas most aspects of the copulation-oviposition cycle ofP. litigataare characteristic of other necrophagous or scatophagous flies, the manner in whichP. litigatafemales expel and ingest ejaculate materials after copulation has not been reported in any other-species of Diptera.
DIURNAL BEHAVIOR OF THE APPLE BLOTCH LEAFMINER MOTH, PHYLLONORYCTER CRATAEGELLA (LEPIDOPTERA: GRACILLARIIDAE)
Authors: Green Thomas A. , Prokopy Ronald J.
Published: November 2009

Observations of apple blotch leafminer moths, Phyllonorycter crataegella (Clemens), during daylight hours in commercial apple orchards in New England from 1982 through 1984 indicated a diurnal pattern of activity. Substantial flight in the morning, almost exclusively by males, was associated with mating, and lesser flight from midafternoon until darkness, predominantly by females, was associated with oviposition. Moths were comparatively inactive during midday hours, at which time they were located primarily on the lower third of the tree trunk during the first moth flight (overwintering generation moths), and on leaves during the second and third moth flights (first and second generation moths, respectively). Moths were concentrated at the inner half of the tree canopy during all three moth flights, and especially below 1.5 m height during the first moth flight.
NEW WORLD SPECIES OF CHLORITA, NOTUS, AND FORCIPATA (RHYNCHOTA: HOMOPTERA: CICADELLIDAE: TYPHLOCYBINAE) WITH A NEW TRIBE FORCIPATINI
Authors: Hamilton K.G.A.
Published: November 2009

Chlorita nearctica is described from the Yukon Territory and is the first member of its genus found in the New World. A synopsis is presented to the Old World species of Chlorita Fieber, 1866 (Typhlocybinae, tribe Empoascini). A new typhlocybine tribe Forcipatini is created for Forcipata DeLong & Caldwell, 1936 and Notus Fieber, 1866. A synopsis of the genus Notus is presented, with Curta as a subgenus containing only the type species. Notus isolatus sp.nov. is described from Drummond Island, Michigan, in Lake Huron and from Quebec. A synopsis of the genus Forcipata DeLong & Caldwell is presented; all species belong to a single subgenus. Five new species are described: F. forficula from Florida, F. ips from Alaska and Yukon, F. montana from the mountains of British Columbia and Montana, and F. unica and F. xlix from Wisconsin. The New World species of the forcipatine genera are keyed.
MANAGEMENT OF LATE-SEASON ADULTS OF THE COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) WITH ENTOMOPATHOGENIC NEMATODES
Authors: Stewart Jeff G. , Boiteau Gilles , Kimpinski Joe
Published: November 2009

The susceptibility of Colorado potato beetle [Leptinotarsa decemlineata (Say), Coleoptera: Chrysomelidae] to entomopathogenic nematodes (Steinernema carpocapsae, ’All’ strain, Nematoda: Heterorhabditae) was tested in the laboratory and the field in 1992 and 1993. Under laboratory conditions, applications of 5.0 × 105S. carpocapsae per square metre to larvae, pupae, and (or) adults resulted in 100% mortality in all experimental groups. Steinernema carpocapsae persisted through the larval–pupal and pupal–adult transitions. A single application of nematodes was sufficient to control the Colorado potato beetle. The following treatments were tested at field sites in New Brunswick and Prince Edward Island: (i) untreated check, (ii) application of nematodes, or (iii) application of insecticides. Straw mulch was either present or absent in each treatment. In 1992 in New Brunswick, nematodes and fenvalerate reduced Colorado potato beetle populations by 31% compared with the untreated check. However, in 1993, differences among treatments were not significant. The results from the field trials in Prince Edward Island were variable; the life expectancy of nematodes is likely shorter in the field than under laboratory conditions. Further investigation into the benefits of repeated applications of nematodes, higher rates, or improvements in application technology are required to achieve consistent control of the Colorado potato beetle.