bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE SPATIAL DISTRIBUTION OF SPRING AND SUMMER POPULATIONS OF ADULT POTATO FLEA BEETLES, EPITRIX CUCUMERIS (HARRIS) (COLEOPTERA: CHRYSOMELIDAE), ON SMALL PLOTS OF POTATOES
Authors: Stewart Jeff G. , Thompson Leith S. 
Published: November 2009

AbstractThe spatial distribution of spring and summer populations of the potato flea beetle, Epitrix cucumeris (Harris) (Coleoptera: Chrysomelidae), on potatoes (“Superior” variety) was studied in 1987 and 1988. Slopes of the regression of mean crowding on the mean number of adults per plant were not significantly different from 1.0 except for summer populations in 1988. The y-intercepts of these regression equations were not significantly different from 0, suggesting that adults of the potato flea beetle are not aggregated. The ratios of mean crowding to mean number of adults per plant were 0.81 for spring populations and 1.02 for summer populations, also indicating that the populations were not highly aggregated. With a level of precision of 0.25, 10 samples per plot were appropriate when more than 2.8 adults per plant were present in the spring and when more than 7.2 adults per plant were present in the summer.
EFFECTS OF SELECTED JUVENILE HORMONE ANALOGS ON SIXTH-INSTAR LARVAE OF THE EASTERN SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA CLEMENS (LEPIDOPTERA: TORTRICIDAE)
Authors: Mulye Hemendra , Gordon Roger 
Published: November 2009

AbstractThe effectiveness of seven insect juvenile hormone analogs (JHAs) in disrupting metamorphosis of the eastern spruce budworm, Choristoneura fumiferana Clemens, was determined by applying the compounds topically to early sixth-instar larvae and monitoring subsequent development. Fenoxycarb showed promising control potential, with an LC50 of 0.26 μg per insect. Relative lethal effectiveness, based on LC50 values, was Fenoxycarb > ZR9892 > ZR8487 > S-71639 > methoprene > ZR9582 > ZR10151. Some of the JHAs tested may be useful in an integrated spruce budworm control program.
DESCRIPTIONS OF THE IMMATURE STAGES AND ADULT REPRODUCTIVE SYSTEMS OF ATHRYCIA CINEREA (COQ.) (DIPTERA: TACHINIDAE), A NATIVE PARASITOID OF MAMESTRA CONFIGURATA (WALK.) (LEPIDOPTERA: NOCTUIDAE)
Authors: Arthur A.P. , Powell Yvonne M. 
Published: November 2009

AbstractThe immature stages of Athrycia cinerea (Coq.) including the egg, three larval instars, and the puparium are described and illustrated. The male and female reproductive systems are also illustrated and described and notes on oogenesis are provided.
LOCAL AND REGIONAL RESISTANCE TO FENVALERATE IN PSYLLA PYRICOLA FOERSTER (HOMOPTERA: PSYLLIDAE) IN WESTERN NORTH AMERICA
Authors: Croft B.A. , Burts E.C. , van de Baan H.E. , Westigard P.H. , Riedl H. 
Published: November 2009

AbstractFenvalerate resistance was monitored in Psylla pyricola Foerster populations at 51 sites in Washington, Oregon, California, and British Columbia during early 1988. Resistance levels ranged from susceptible in an organic orchard in the Willamette Valley, OR, and at several other sites in Oregon and California, to highly resistant (> 100-fold compared with a susceptible strain) at several sites in central Washington. Generally, resistance levels were greater in the north than the south. In the Wenatchee and Yakima/Ellensburg, WA, areas, pyrethroid resistance was areawide, showing similar levels in both heavily treated and untreated orchards. In the Willamette Valley, OR, pyrethroid resistance was local and more consistent with the treatment histories of individual orchards. Factors influencing regional resistance appeared to be the species pool size of resistant and susceptible pear psylla, the intensity of spraying, and the unique host plant, life cycle, and dispersal attributes of this pest. Reasons for high regional resistance in central Washington and not in southerly areas are unknown, but this pattern is consistent with earlier patterns of insecticide resistance in pear psylla. The observed trends in fenvalerate resistance are discussed in relation to limiting resistance in pear psylla.
EFFECTS OF CONSTANT AND FLUCTUATING TEMPERATURES ON IMMATURE DEVELOPMENT AND AGE-SPECIFIC LIFE TABLES OF RHOPALOSIPHUM PADI (L.) (HOMOPTERA: APHIDIDAE)
Authors: Elliott N.C. , Kieckhefer R.W. 
Published: November 2009

AbstractRelationships between temperature and immature developmental rates of apterous and alate Rhopalosiphum padi (L.) were determined in laboratory experiments conducted at constant and fluctuating temperatures. Lower and upper thresholds for development were 5.78 and 25.09 °C, respectively. Studies at fluctuating temperatures which simulated average and extreme low and high temperatures occurring during late-spring in eastern South Dakota were conducted to determine developmental rates and age-specific life table statistics. Developmental rates for cohorts exposed to variable temperatures were similar to expected developmental rates determined from constant temperature studies. Age-specific life table statistics differed among alate and apterous R. padi exposed to identical temperature regimes. On a day time scale, population growth rates of either morph increased with increasing temperature. When data were expressed on a degree-day time scale, population growth rates were similar for cohorts of either morph exposed to low and average temperature regimes. Population growth rates declined for cohorts of both morphs exposed to high temperatures. Equations were provided that estimate age-specific survival and natality for fluctuating temperatures. Stable nymphal instar distributions for apterous R. padi were similar at all temperatures; for populations with stable age structures, approximately 55, 15, 10, 7, and 10% of individuals would be first, second, third, and fourth nymphal instars, and adults, respectively.
DESCRIPTION OF ADULTS OF ARRENURUS (?MICRURACARUS) KITCHINGI SP.NOV. (ACARINA: ARRENURIDAE) FROM WATER-FILLED TREE HOLES IN AUSTRALIA
Authors: Smith Ian M. , Harvey Mark S. 
Published: November 2009

AbstractAdults of Arrenurus (?Micruracarus) kitchingi sp.nov. are described. This is the first species of Arrenurus to be reported from a tree-hole habitat. Problems with the currently used subgeneric classification of Arrenurus are discussed.
PHENOLOGY, MOVEMENT, AND WITHIN-FIELD DISTRIBUTION OF THE GRAPE BERRY MOTH, ENDOPIZA VITEANA (CLEMENS) (LEPIDOPTERA: TORTRICIDAE), IN NEW YORK VINEYARDS
Authors: Hoffman C.J. , Dennehy T.J. 
Published: November 2009

AbstractFrom 1976 to 1986, the average date of first male pheromone trap catch of grape berry moth was 20 May with an average degree-day (DD) accumulation (base 10 °C) of 150.1 (SE = 13.2). Fifty percent cumulative trap catch of the first generation of males averaged 334.1 (SE = 7.8) DD with an average date of 11 June. Degree-day accumulation was a more accurate method for predicting peak male trap catch than predictions based upon vine phenology and calendar date. Within-field distribution and levels of berry moth infestation were markedly affected by the surrounding habitat. Wooded edges or hedgerows were closely associated with an increase in the level of damage along vineyard borders and higher levels of overall infestation when compared with vineyards without wooded edges. Egg and larval infestation levels in wild hosts (Vitis spp.) were greater than those within adjacent commercial vineyards. Early in the season, male berry moth were trapped in high numbers in wooded areas adjacent to vineyards. After mid-July, males were trapped predominantly within vineyards and few were trapped in wooded edges. Movement of adults from wooded areas into vineyards is not suggested by observed patterns of female oviposition. Females oviposited primarily on wild hosts within the wooded areas and within the adjoining vineyard edges throughout the season.
DEVELOPMENT OF TWO RANGELAND GRASSHOPPERS AT CONSTANT TEMPERATURES: DEVELOPMENT THRESHOLDS REVISITED
Authors: Kemp William P. , Dennis Brian 
Published: November 2009

AbstractA study was conducted to examine the relationship between development rate and constant temperatures (14, 21, 24, 27, 33, 36, 40, and 45°C) for the rangeland grasshoppers Melanoplus sanguinipes (F.) and Aulocara elliotti (Thomas). Non-linear regression was used to generate estimates of lower development thresholds. The chosen model provided for a concave-shaped development rate function at temperatures above the lower threshold and required fewer parameters than previous models. Although experimental results suggested that no precise estimates of upper development thresholds could be obtained, previous field studies indicate that preferred body temperatures may be lower than ambient temperatures and probably are related in part to the thermoregulatory abilities of the two species studied. Results will be of interest to insect ecologists and those studying grasshopper biology as well as researchers and pest managers interested in predicting grasshopper development.
OBSERVATIONS ON A TRIAL OF BROADCAST BURNING TO CONTROL AN INFESTATION OF THE MOUNTAIN PINE BEETLE DENDROCTONUS PONDEROSAE
Authors: Stock A.J. , Gorley R.A. 
Published: November 2009

The mountain pine beetle, Dendroctonus ponderosae Hopk., causes extensive mortality of lodgepole pine, Pinus contorta var. latifolia Engelm., throughout western North America (Van Sickle 1982). The Prince Rupert Forest Region, in the northwest of British Columbia, initiated an aggressive beetle management program in 1981. Logging of infested stands, and winter felling and burning of individual infested trees are the most common direct control techniques.The “Bristol Lake” infestation developed in the Bulkley Forest District, approximately 55 km northwest of Smithers, B.C., on a steep rocky ridge within the valley of Harold Price Creek. The area contained large volumes of mature lodgepole pine, and control of the infestation was therefore considered critical to the local beetle management plan, but the size (50 ha) and rough topography of the infested area precluded normal direct control measures.
EFFICACY OF OIL-BASED FORMULATIONS OF BACILLUS THURINGIENSIS BERLINER VAR. KURSTAKI AGAINST THE HEMLOCK LOOPER, LAMBDINA FISCELLARIA FISCELLARIA (GUEN.) (LEPIDOPTERA: GEOMETRIDAE)
Authors: West R.J. , Raske A.G. , Sundaram A. 
Published: November 2009

AbstractOil-based formulations of Bacillus thuringiensis Berliner var. kurstaki, Dipel 132, Dipel 176, and Dipel 264, were aerially applied at rates of 1.18–2.36 L/ha over five 30-ha plots in a balsam fir, Abies balsamea (L.) Mill., forest in efficacy tests against the eastern hemlock looper, Lambdina fiscellaria fiscellaria (Guen.), in Newfoundland. Double applications of 30 Billion International Units (BIU) per hectare of each formulation and single applications of 40 BIU per hectare of Dipel 176 and Dipel 264 were tested. Larval population reductions of more than 95% and no defoliation of old or new foliage were observed in the plots receiving double applications and in the plot treated with a single application of Dipel 264. Larval numbers were reduced by 85% and defoliation was 4% in the plot treated once with Dipel 176.These treatments were applied against low to moderate larval populations, and their success was attributed to excellent spray coverage and early application when 50% or more of the larvae were still in their first instar.
EASTERN SUBTERRANEAN TERMITE (ISOPTERA: RHINOTERMITIDAE) FORAGING TERRITORIES AND POPULATIONS IN TORONTO
Authors: Grace J.K. , Abdallay A. , Farr K.R. 
Published: November 2009

AbstractA mark–release–recapture study was conducted with dye-marked eastern subterranean termites, Reticulitermes flavipes (Kollar), at two sites in metropolitan Toronto. Interconnected termite galleries were found to extend up to 79 m and to cover areas of 266 and 1091 m2. Colony foraging populations at the two sites were estimated at 2.1 and 3.2 million termites. These foraging distances and population estimates exceed those reported for R. flavipes in other regions.
IDENTIFICATION OF SEX PHEROMONE COMPONENTS OF THE BLACK ARMY CUTWORM, ACTEBIA FENNICA (TAUSCHER) (LEPIDOPTERA: NOCTUIDAE), AND A SEX ATTRACTANT BLEND FOR ADULT MALES
Authors: Struble D.L. , Byers J.R. , Shepherd R.F. , Gray T.G. 
Published: November 2009

AbstractThe sex pheromone components of the black army cutworm, Actebia fennica (Tauscher), were identified in abdomen-tip extracts from calling female moths. The primary pheromone component was (Z)-7-dodecenyl acetate. Although (Z)-11-tetradecenyl acetate was detectable only in trace quantities in the extracts, it was the major component in the best synthetic blend for attraction of male moths. The most effective synthetic blend was (Z)-7-dodecenyl acetate and (Z)-11-tetradecenyl acetate at a ratio of 1:20. No other component detected in the extracts increased trap capture of males when added to the two-component blend; however, (Z)-5-dodecenyl acetate, (Z)-7-dodecenol, and (Z)-9-tetradecenyl acetate reduced catches. This two-component blend will be useful for studying the habits of the adults and for population monitoring.
THE IDENTITY OF MICREMPIS ANATOLICA CHILLCOTT AND M. BOMBOXYNON CHILLCOTT (DIPTERA: EMPIDIDAE), WITH REMARKS ON ALLIED NEARCTIC SPECIES
Authors: Cumming J.M. , Cooper B.E. 
Published: November 2009

AbstractMicrempis anatolica Chillcott is considered a junior subjective synonym of M. bomboxynon Chillcott, based on re-examination of purported differences in the female terminalia given by Chillcott and Teskey (1983), as well as examination of a number of additional specimens collected from eastern North America. As a result of its new broader concept, M. bomboxynon is redescribed, a distribution map of the species is provided, and separation from other Nearctic species of Micrempis is discussed.
DISTRIBUTION OF BARBARA COLFAXIANA (KEARFOTT) (LEPIDOPTERA: TORTRICIDAE) EGGS WITHIN AND AMONG DOUGLAS-FIR CROWNS AND METHODS FOR ESTIMATING EGG DENSITIES
Authors: Sweeney J.D. , Miller G.E. 
Published: November 2009

AbstractThe spatial and frequency distributions of Douglas-fir cone moth, Barbara colfaxiana (Kearfott), eggs in Douglas-fir trees and stands were determined by dissecting 13 262 conelets collected from 81 trees in three sites and 2 years. There were no consistent trends in egg density associated with crown level or aspect. The frequency distribution of eggs per conelet fitted the negative binomial in three of five site-years but a common k for the negative binomial could not be calculated. Green’s index of aggregation suggested that the cone moth egg distribution was significantly aggregated in each site-year.The optimal number of conelets per tree to sample was determined to be four in forest stands and three in seed orchards. The number of sample trees required for estimating mean egg density with 10% and 20% precision and 90% confidence was calculated for a range of mean egg densities using the method of Kuno. The sample sizes required to estimate a control threshold density of 0.6 eggs per conelet with 10% precision and 90% confidence were very large and would be impractical for operational use. Therefore, a sequential sampling plan was developed for use in seed orchards that would classify cone moth egg densities as either above or below a critical density at which 10% seed loss would be expected.
SPATIAL AUTOCORRELATION, SPATIAL MODELING, AND IMPROVEMENTS IN GRASSHOPPER SURVEY METHODOLOGY
Authors: Johnson D.L. 
Published: November 2009

AbstractAnalysis of 10 years of grasshopper survey data (1978–1987) indicated that grasshopper populations in fields can be reliably predicted from roadside survey counts. Direct estimation of grasshopper densities in crop fields is no longer required for summaries of infestation levels or forecasts. Spatial autocorrelation was significant and positive for both roadside and field counts. The coefficient of variation of the field counts was greater than that of the roadside counts in each of the last 10 years. Population density was summarized by crop type and sampling method for the last 10 years. Linear regressions fitted to the 1978–1984 grasshopper survey data were used to estimate field population density from crop type and roadside counts in 1985–1987. Maps of population density were generated from the predicted and observed field counts with SPANS, a microcomputer-based geographic information system. Large coefficients of association (73–79%) between the predicted and observed maps attested to the sufficiency of road-side counts as the basis for production of population density maps.
LIFE CYCLE OF THE NYMPH FLY PALAEODIPTERON WALKERI IDE 1965 (DIPTERA: NYMPHOMYIIDAE) IN THE WHITE MOUNTAINS OF SOUTHERN QUÉBEC
Authors: Harper P.P. , Lauzon Michel 
Published: November 2009

AbstractCollections of larvae over 1 year in the River Clinton in the White Mountains of southern Québec indicated that Palaeodipteron walkeri Ide is bivoltine and that there are five larval instars. In April, larvae were in their fourth and fifth instars. Adults emerging in May and June gave rise to a summer generation in which most individuals emerged in August and September. The offspring of these adults, together with stragglers from the summer generation, formed an overwintering generation. Overwintering was completed in the larval stage, mainly the third and fourth instars. There was some growth in winter and development increased in the spring. Our data were compared with previously published observations; although no discrepancy occurred, our interpretation was different. Previous schemes proposed for the life cycle in this species were based on few specimens and lacked winter observations.
A SEX ATTRACTANT FOR THE SPRUCE SEED MOTH, CYDIA STROBILELLA (L.), AND THE EFFECT OF LURE DOSAGE AND TRAP HEIGHT ON CAPTURE OF MALE MOTHS
Authors: Grant G.G. , Fogal W.H. , West R.J. , Slessor K.N. , Miller G.E. 
Published: November 2009

AbstractElectroantennogram (EAG) responses from male Cydia strobilella (L.) indicated that (E)-8-dodecenyl acetate (E8-12:Ac) was the most stimulating of the dodecenyl and tetradecenyl compounds assayed. Field-screening tests, which included compounds previously reported as attractive, demonstrated that only E8-12:Ac was effective. The optimum trap dosage was 0.3–3 μg on red rubber septa. Catches of males were greater when traps were hung in the upper crown of either white spruce or black spruce.
PHYTOPHAGOUS INSECT COMPLEX ASSOCIATED WITH CONES OF WHITE FIR, ABIES CONCOLOR (GORD. AND GLEND.) LINDL., AND ITS IMPACT ON SEED PRODUCTION
Authors: Shea Patrick J. 
Published: November 2009

AbstractWhite fir cones were sampled for insect damage from wild stands in California and Nevada during 1984–1986. Insects were recovered from cones and seed damage was partitioned by insect species. The important phytophagous insects were separated into guilds: the cone- and seed-mining guild, Dioryctria abietivorella Groté, Eucosma prob. siskiyouana (Kearfoot), Cydia prob. bracteatana (Fernald), Barbara sp.; the seed-feeding guild, Megastigmus pinus Parfitt, M. rafni Hoffmeyer, Earomyia abietum McAlpine; and the scale- and bract-feeding guild, Asynapta hopkinsi Felt, Dasineura prob. abiesemia Foote, Resseliella conicola (Foote), Strobilomyia abietis (Huckett). Total damage by insects varied by year and site, reaching a maximum of 47% in 1986 on one site and a minimum of 12.5% in 1984 on another. Abortion and incomplete development also were major factors in the production of sound seed. Populations of white fir cone and seed insects varied with cone crop but also were affected by the occurrence of cone crops on alternate hosts. During most years, the seed-mining guild insects were the major cause of seed damage.
DESCRIPTION OF THE IMMATURE STAGES AND NOTES ON THE BIOLOGY OF NEOTEPHRITIS FINALIS (LOEW.) (DIPTERA: TEPHRITIDAE), A PEST OF SUNFLOWERS IN SASKATCHEWAN, CANADA
Authors: Arthur A.P. , Mason P.G. 
Published: November 2009

AbstractThe immature stages of Neotephritis finalis (Loew.) are described and figured. Notes on the biology and the larval feeding damage to cultivated sunflowers also are given.
SEASONAL BIOLOGY OFMETEORUS TRACHYNOTUSVIER. (HYMENOPTERA: BRACONIDAE) AND OF ITS OVERWINTERING HOSTCHORISTONEURA ROSACEANA(HARR.) (LEPIDOPTERA: TORTRICIDAE)
Authors: Maltais J. , Régnière J. , Cloutier C. , Hébert C. , Perry D.F. 
Published: November 2009

AbstractThe braconid parasitoidMeteorus trachynotusVier. was found in overwintered larvae of the obliquebanded leafroller,Choristoneura rosaceana(Harr.), on foliage of a variety of deciduous species, well before the parasitoid’s attack on the spruce budworm,Choristoneura fumiferana(Clem.). In the spring, percentage parasitism ofC.rosaceanabyM.trachynotuswas 8.0 and 18.8% in 1986 and 1987, respectively. Maximum parasitism onC.fumiferana(35 and 4% in 1986 and 1987, respectively) was reached in late June, at a time when over 50% ofM.trachynotuscocoons found on deciduous vegetation had emerged. Twenty days later, parasitoids produced onC.fumiferanareached 50% adult emergence. The catches of adult parasitoids on sticky traps placed on deciduous trees and on conifers showed two periods of adult activity. Based on the sex ratio of captured parasitoids, maleM.trachynotuswere active at emergence sites, whereas females were found mostly in the habitats of available hosts. The phenology ofC.rosaceanawas observed in 1987. As indicated by light-trap captures, males fly sooner than females. Eggs were laid in July, and so the early larval stages were available to femaleM.trachynotusas overwintering hosts. Several parasitoids common toC.rosaceanaandC.fumiferanawere identified.
GEINA SHEPPARDI, A NEW SPECIES OF GRAPE-FEEDING PLATYPTILIINAE (LEPIDOPTERA: PTEROPHORIDAE) FROM EASTERN NORTH AMERICA, WITH NOTES ON RELATED SPECIES
Authors: Landry Bernard 
Published: November 2009

AbstractGeina sheppardi sp.nov., a grape-feeding platyptiliine (Pterophoridae), is described. Its distribution, biology, and diagnostic features are discussed and related to those of two other partly sympatric and morphologically similar species of grape-feeding Platyptiliinae, Sphenarches Ontario (McDunnough) and Geina periscelidactyla (Fitch). A lectotype is designated for the latter.
CYSTIPHORA SONCHI (BREMI) (DIPTERA: CECIDOMYIIDAE), A NEW BIOLOGICAL CONTROL AGENT ESTABLISHED ON THE WEED PERENNIAL SOW-THISTLE (SONCHUS ARVENSIS L.) (COMPOSITAE) IN CANADA
Authors: Peschken D.P. , McClay A.S. , Derby J.L. , DeClerck R. 
Published: November 2009

AbstractAspects of the biology of Cystiphora sonchi (Bremi) (Diptera: Cecidomyiidae) were investigated and releases were made on perennial sow-thistle (Sonchus arvensis L.) (Compositae) in six provinces of Canada. Fecundity, determined by dissection of newly emerged females, averaged 86.2 eggs. Cystiphora sonchi became established in Alberta, Saskatchewan, Manitoba, and Nova Scotia, and produced three generations at Vegreville, Alberta. In fall, mature larvae enter the soil, and most can pupate in temperatures of 4 °C. The gall fly thrives in shady and sunny locations. Cattle caused considerable fly mortality by feeding on galled leaves of perennial sow-thistle. Extremely dry or moist soils reduced the number of adults that emerged from pupation and extremely moist soils increased the lengths of the pupation periods. Flooding caused greater mortality of pupae than of larvae but 2% of the larvae survived flooding up to 8 weeks.