bluuebunny/crossref_metadata_2025 huggingface dataset:
Coupled fixed points and coupled best proximity points for cyclic Ćirić type operators
Authors: Magdaş Adrian
Published: May 2019

The purpose of this paper is to study the coupled fixed point problem and the coupled best proximity problem for single-valued and multi-valued contraction type operators defined on cyclic representations of the space. The approach is based on fixed point results for appropriate operators generated by the initial problems.
The rise of encrypted malware
Authors: Yaacoubi Omar
Published: May 2019

Increasingly complex multi-cloud architectures and more stringent regulatory environments have increased reliance on encryption – primarily secure sockets layer (SSL) and transport layer security (TLS) – to the extent that over 80% of all network traffic is now encrypted. While in many ways the growth of encryption is a good thing for security, it also creates a backdoor for hackers and threat actors looking to hide from traditional detection tools.

Organisations are adopting more stringent encryption practices. And while the growth of encryption might seem a good thing for security, it also creates a backdoor for hackers and threat actors looking to hide from detection tools.

Additionally, as organisations continue to move to the cloud, increase their utilisation of APIs and adopt ever-more complex and sensitive systems, they find themselves with ever-more complex multi-cloud architectures. The solution lies in encrypted cognitive analytics, argues Omar Yaacoubi of Barac, which enables the creation of new types of data elements or telemetry that are independent of protocol details.
Marx's Conception of Dialectical Contradiction in Commodity
Authors: Abazari Arash
Published: May 2019

In this paper, I clarify the structure of dialectical contradiction in Marx in order to show how it is influenced by Hegel. To this aim, I focus on the only place where Marx systematically develops the concept of dialectical contradiction, namely, in his analysis of commodity in the first chapter of Capital. Here Marx claims that the commodity is the contradictory unity of use-value and exchange-value. To make this claim intelligible, I first discuss Hegel's conception of ‘the thing’ [Das Ding] in the Science of Logic and demonstrate how for Hegel ‘the thing’ is the contradictory unity of matter and form. With this Hegelian machinery, then, I turn to Marx to show how use-value and exchange-value constitute the matter and the form of commodity, and argue how they contradict each other.
Who Will Replace Parker? A Copula Function Analysis of BordeauxEn PrimeurWine Raters
Authors: Cyr Don , Kwong Lester , Sun Ling
Published: May 2019

The influence of the wine rater Robert Parker Jr. on Bordeaux wine extended over a 40-year period, with a particular impact onen primeurwine prices. Consequently, his announcement in 2015 that he would no longer rateen primeurwines creates some uncertainty for many chateaux that have purposely designed their production with his palate and preferences in mind. Although the wine rater Neal Martin was named by Parker to be his successor in terms ofen primeurwine ratings, there are several other wine critics who have consistently rateden primeurwines over several years. Consequently, we employ copula function analysis to explore which wine critics’ ratings exhibit the closest linear and nonlinear relationship, for right banken primeurwines, with those of Parker. The study employs data over the period of 2005 through 2012, during which time several wine critics, including Neal Martin for the period of 2010–2012, rateden primeurwines alongside Parker. Our results indicate that of the wine critics that continue to rateen primeurwines, the ratings of James Suckling exhibit the highest rank correlation and also bivariate upper tail dependence, identified through copula function analysis, with those of Parker. (JEL Classifications: C19, G13, L66)
Professor Martin A. Feinrider (1947-1986)
Authors: Nafziger James A. R.
Published: May 2019

One of the Society’s promising young teachers, Professor Martin A. Feinrider, died on June 16, 1986, the innocent victim of an automobile collision. Just a month before his death, he had been awarded tenure and a full professorship at Nova University.
The Phonology of Epenthetic Segments
Authors: Piggott Glyne L. , Singh Rajendra
Published: May 2019

The purpose of this paper is to demonstrate that the occurrence of epenthetic vowels and consonants can be attributed to certain properties of syllable structure and some universal principles of syllabification interacting with (phonotactic) constraints, some of which are universal, others language-specific. The analysis of epenthesis proposed here is an elaboration and refinement of earlier proposals by Singh (1980, 1981a, 1981b, 1981c) and Piggott (1981). We believe that this analysis provides an explanation of the phenomenon of epenthesis. The paper is organized in the following way. In Section 1, we identify the phenomenon of epenthesis and summarize the difficulties in capturing generalizations about it within a framework which treats phonological representations as linear sequences of elements. In Section 2, we outline our conception of syllable structure and examine some of the consequences and implications of our assumptions. Section 3 contains an elaboration of the principles of syllabification that underlie our account of epenthesis. In Section 4, we indicate what we think we have managed to explain and point out some of the significance of the explanation provided. Finally, in Section 5, we try to link our work to some long-held views about the relationship of rules to constraints.
The Recovery of Free Agency in the Theology of St. Augustine
Authors: Wetzel James
Published: May 2019

In The Spirit and the Letter Augustine claims that grace not only avoids abrogating human freedom it actually establishes free will. His claim raises some intriguing questions. What sort of freedom is it that can be established only by the influence of another agent—in this case, God—and what sort of bondage is it that is overcome by grace? If we remain exclusively within Augustine's theological discourse, the answers come straightforwardly and by now have a ring of familiarity. The freedom in question is the state of loving God over and above his worldly and time-bound creations, fulfilling (with divine assistance) the demands of the Law, and finding one's happiness in reconciliation with the eternal through the mediation of Jesus Christ. Bondage is conversely the blindness and perversity of keeping one's attention fixed on creation apart from its relation to its Creator and of courting the satisfaction of only those desires which are framed independently of God's claims on every human being. Freedom is loving well or having a bona voluntas; bondage is loving aimlessly, unreflectively, and hence destructively.
Floating Charges on Assets of Individuals
Authors: Weisman Joshua
Published: May 2019

The Security Interests Law, 1967, created a revolutionary change in Israel's law of security interests inasmuch as it replaced the previous obsolete regime with a modern one. Notwithstanding, it refrained from adopting a clear position on the question of whether a non-corporate debtor may create a security interest over his assets by means of a floating charge. Such a charge, which according to Israeli law may be given by companies and cooperative societies, applies to both the current property of the debtor and any property which he may acquire in the future. The uniqueness of the floating charge, however, is not merely insofar as it extends to the future property of the debtor. Unless otherwise provided for, the floating charge allows the debtor to continue to execute transactions with his assets, such as their sale or mortgage, whereby the grantee of the rights by virtue of such transactions is not subject to the floating charge.
Custom in the Enforcement of the Law: The Power of the Attorney-General to Stay Criminal Proceedings
Authors: Gavison Ruth
Published: May 2019

This article is a synopsis of a monograph which will be published shortly (in Hebrew) by the Harry Sacher Institute for Legislative Research and Comparative Law. I dedicate it to Professor Tedeschi because he was the one who triggered it ten years ago, with his suggestion that the study of law, and especially the study of contexts of discretion in the law, cannot be complete without detailed studies of the ways in which officers in practice use their powers. Custom thus has an easily overlooked importance as a source of law even in modern systems, in the many areas in which mere knowledge of the normative framework within which powers are exercised is insufficient for a knowledge and understanding of the law.

Tedeschi's suggestion seemed correct on its face, to an extent sufficient to motivate me to leave theorizing about law from the armchair and look into the practice of law enforcement. I emerged from the adventure even more convinced of his insight than when I started.

While working on the subject I realized that comparative analysis was also of relevance to such questions, and that important questions were raised about the utility of such analyses in attempts to solve one's problems. Again I have found that Tedeschi articulated the conclusion I have reached in an early article published years ago.

So these insights of his were added to the many things for which I am indebted to Professor Tedeschi: the solid commitment to legal scholarship for which he has always stood; the varied, persistent and prolific interest he has in all things legal and in the life-problems which the law seeks to regulate, resulting in many essays which are to this day classic in their field; and the fact that he is among the rare scholars who practice what they preach. If we take the importance of custom as an example, Tedeschi insists on including sections on custom in all his articles on legal problems, and in many instances this combination of great analytical strength and attention to social reality is what makes Tedeschi's writings so important. It is rare to have such people as one's teachers, and I feel lucky and grateful to have been his student.

The larger study on which this article is based elaborates in some detail these larger jurisprudential questions of the complex relationships between solutions of legal problems (or law reform) and legal theory, empirical research and comparative analysis. Here I shall confine myself to the major findings of my research into the reality and the ideal of the power of the Attorney-General to stay criminal proceedings.
Custom in Public Law
Authors: Shetreet Shimon
Published: May 2019

This article is based on a study on custom in public law conducted some years ago due to the welcome initiative of Prof. G. Tedeschi. Like many others, I too responded to his irresistible powers of persuasion, to conduct a study on custom in a field close to my area of interest, public law. I owe many thanks to Prof. Tedeschi, for by virtue of this study I have acquired significant perspectives for the analysis of public law.

During the course of my work on another study (on judicial independence, conducted for the Jerusalem Institute for the Study of Israel), I discovered an historical document pertaining to Prof. Tedeschi, in whose honour this issue of the Israel Law Review appears. The document concerns an offer, addressed to Prof. Tedeschi in 1953, to be appointed a Justice of the Supreme Court.
Right-Based Justification of Punishment
Authors: Marmor Andrei
Published: May 2019

The deontological justification of punishment is generally associated with the notion of “retributive justice”. This notion, however, underlies only one of two distinct approaches by which one may attempt to justify punishment within deontological morality. According to this, the classical approach, punishment is to be regarded as an end in itself, intrinsically valuable, from the moral point of view. According to other deontological views, however, punishment has only instrumental value – not, as in consequentialism, in the maximization of some general social good, but in the maintenance and equal distribution of basic individual rights. Borrowing Dworkin's terminology, this view can be called a “right-based” conception of punishment.
F. P. Veselovskii and the Law of Nations
Authors: Butler W. E.
Published: May 2019

The early Russian literature on international law was largely produced by diplomatic practitioners in the course of, or in supplementation of, their official duties. The most celebrated example, regarded as the first original Russian work on international law in the Russian language, is P. P. Shafirov's discourse on the just causes of the war between Sweden and Russia, Razsuzhdenie kakie zakonnye prichiny ego Tsarskoe velichestvo Petr Pervym…k nachatiiu voiny protiv Korolia Karola 12, Shvedskogo 1700 godu imel… (Spb., 1717). Translated into English and German, the Tsar intended that all Europe should understand Russia's legal pretensions against Charles XII of Sweden through Shafirov's book and himself edited the final text and contributed the conclusion. At Imperial behest two further Russian editions were printed in 1719 and 1722 in thousands of copies.
A final reply to te Nijenhuis et al. (2019)
Authors: Flynn James R.
Published: May 2019

The effects of educational training are only one case of producing two groups (before and after) separated by IQ test performance on easier and harder items. The crux of the issue is whether we know that the causes between groups are genetic if they are differentiated by a Jensen effect and that the causes are environmental if they are differentiated by an anti-Jensen effect. A Jensen effect occurs when the two groups differ more as cognitive tasks become more complex. It is shown that genes vs environment must be diagnosed on a case-by-case basis, not in terms of whether a Jensen effect is present.
‘Responsibility of the Great Ones’: How the Organization of American States and the United Nations Helped Resolve the Cuban Missile Crisis
Authors: Keller Renata
Published: May 2019

This article draws on an international assemblage of sources to recover the history of the involvement of the Organization of American States (OAS) and the United Nations (UN) in the Cuban missile crisis. It argues that, through the mechanisms of the OAS and the UN, Latin American citizens and officials helped shape the peaceful outcome of the crisis. This article challenges dismissive portrayals of both Latin American countries and multilateral organisations and, in so doing, joins the growing literature on how supposedly weak Latin American countries have used international organisations to influence world affairs.
Bryozoans from the Murfreesboro and Pierce Limestones (Early Black Riveran, Middle Ordovician), Stones River Group, of Central Tennessee
Authors: Karklins Olgerts L.
Published: May 2019

The Murfreesboro Limestone and the succeeding Pierce Limestone (Black Riveran, Middle Ordovician) of the Stones River Group, the oldest rocks exposed in central Tennessee, contain a fossil invertebrate fauna including bryozoans. Bryozoans are relatively scarce in the Murfreesboro Limestone but are abundant in the overlying Pierce Limestone. The bryozoan fauna includes the cryptostomes, Escharopora, Graptodictya, Pachydictya, Phylloporina, Stictopora, Stictoporella, Trigonodictya, Ulrichostylus; the trepostomes Amplexopora, Batostoma, Hemiphragma, Nicholsonella, Parvohallopora; and the cystoporates Ceramophylla and Constellaria. These bryozoans are the oldest known in Tennessee and are the only early Black Riveran assemblage in North America described at the species level. Species of Nicholsonella, Pachydictya, and Stictopora in the Murfreesboro and species of Constellaria and Phylloporina? in the Pierce are closely related to those found in rocks of Chazyan age in New York and Vermont. Species of Ceramophylla, Escharopora, and Trigonodictya in the Pierce Limestone of central Tennessee are decidedly similar to species found in Black Riveran strata of New York. The stratigraphic ranges, geographic distribution, and taxonomy of previously described species from Tennessee are updated.
Chesterian (Late Mississippian) Bryozoans from the Upper Chainman Shale and the Lowermost Ely Limestone of Western Utah
Authors: Karklins Olgerts L.
Published: May 2019

Bryozoans are abundant and diverse in the upper part of the Chainman Shale (Mississippian; Osagean, Meramecian-Chesterian) and in the upper Chesterian part of the overlying Ely Limestone (Mississippian-Pennsylvanian) in the Confusion Range of western Utah. The bryozoan assemblage includes 15 genera and 18 species; 12 species are new and 6 are in open nomenclature. The new species are the trepostomes Callocladia jensensis, Stenopora confusionensis, Stenoporella mineriensis, Tabulipora atacta, T. ricta, T. sarcinula, T. stragula, the cryptostomes Ascopora macellata, Rhabdomeson artum, Streblotrypa angulatum, Strebloplax pertusa, and the cystoporate Cystodictya astrepta. Species in open nomenclature are the trepostome Anisotrypa sp., the cryptostomes Saffordotaxis sp., Archimedes sp., Fenestella sp., Penniretepora sp. A, and Polypora sp. Callocladia and Strebloplax are known only from Chesterian strata in North America; Strebloplax is known only from the conterminous United States. The stratigraphic range of Stenoporella, also known only from the United States, is extended into rocks of supposed Pennsylvanian age. Stenoporella mineriensis, the only species in this bryozoan assemblage known to occur outside Utah, is also found in the Ely Limestone (Pennsylvanian) of Nevada.

Tabulipora is the dominant genus in the Chesterian rocks of this region; T. sarcinula and T. ricta are the most abundant taxa. The shallowing of the marine environment and the establishment of carbonate deposition during late Chainman time permitted widespread development and dispersal of the bryozoan faunas in western Utah.
Seasonal Changes in the Germination Responses of Buried Witchgrass (Panicum capillare) Seeds
Authors: Baskin Jerry M. , Baskin Carol C.
Published: May 2019

Buried seeds of witchgrass (Panicum capillare L., # PANCA) exposed to natural seasonal temperature changes in Lexington, KY, for 0 to 35 months exhibited annual dormancy/nondormancy cycles. Seeds were dormant at maturity in early October. During burial in late autumn and winter, fresh seeds and those that had been buried for 1 and 2 years became nondormant. Nondormant seeds germinated from 76 to 100% in light at daily thermoperiods of 15/6, 20/10, 25/15, 30/15, and 35/20 C, while in darkness they germinated from 1 to 24%. In late spring, seeds lost the ability to germinate in darkness, and by late summer 63 to 100% of them had lost the ability to germinate in light. As seeds became nondormant, they germinated (in light) at high (35/20, 30/15 C) and then at lower (25/15, 20/10, and 15/6 C) temperatures. As seeds reentered dormancy, they lost the ability to germinate (in light) at 15/6 C and at higher thermoperiods 2 to 3 months later.
Activity of Selective Postemergence Grass Herbicides in Soil
Authors: Kells James J. , Meggitt William F. , Penner Donald
Published: May 2019

Several herbicides were toxic to barnyardgrass [Echinochloa crus-galli(L.) Beauv. # ECHCG] when applied as a soil treatment at 0.56 kg ai/ha to a sandy loam soil with 0.8% organic matter. At this application rate, haloxyfop {methyl ester of 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, CGA-82725 {2-propynyl ester of 2-[4-[(3,5-dichloro-2-pyridinyl)oxy] phenoxy] propanoate}, and DPX-Y6202 {ethyl ester of 2-[4-[(6-chloro-2-quinoxalinyl)oxy]-phenoxy] propanoate} provided the greatest persistence of activity. At 31, 28, and 25 days after treatment with these herbicides, respectively, barnyardgrass growth was still inhibited by 50%. Soil activity and persistence of fluazifop {butyl ester of (±)-2-[4-[[5-trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} increased following soil sterilization. Covering the soil surface with vermiculite prior to treatment intercepted the spray and significantly reduced control of 4- to 6-cm-tall barnyardgrass plants with fluazifop.
Residual Fluometuron Levels in Three Arkansas Soils under Continuous Cotton (Gossypium hirsutum) Production
Authors: Rogers C. Brent , Talbert Ronald E. , Mattice John D. , Law Terry L. , Frans Robert E.
Published: May 2019

Evidence has shown that fluometuron {N,N-dimethyl-N′-[3-(trifluoromethyl)phenyl]urea} persists beyond the end of the growing season when used in continuous cotton (Gossypium hirsutumL.) production. Samples were taken from three soils following cotton production in 1980, 1981, and 1982. All three soils had been in production under the same herbicide use regime, fluometuron preemergence followed by fluometuron plus MSMA (monosodium methanearsonate), since either 1976 or 1977. The fluometuron remaining in each soil was quantified using a greenhouse bioassay and a chemical extraction technique followed by high-performance liquid chromatography determinations. The fluometuron concentrations determined by bioassay and chemical extraction methods had partial correlation coefficients of 0.62, 0.91, and 0.72 for a Sharkey silty clay, a Dundee silt loam, and a Loring silt loam, respectively. Predictive equations were determined for each soil to relate chemical extraction findings to plant response. Bioassay analysis indicated nearly 2 ppmw of fluometuron in the Sharkey silty clay in October 1980, with 1 ppmw in the Dundee silt loam, and approximately 0.27 ppmw in the Loring silt loam with annual application rates of 4.0, 2.9, and 3.5 kg/ha, respectively. Fluometuron concentrations as determined by chemical analysis were 0.83, 0.34, and 0.14 ppmw, respectively. Fluometuron concentrations declined over the winter in all three soils. Samples taken in March of 1981, 1982, and 1983 showed little difference in carryover levels in the Sharkey silty clay but more yearly variation in the other two soils. Fluometuron was found in all three soils to depths of 60 cm, but more than 55% of the fluometuron was found in the upper 15 cm of each soil. A controlled laboratory study conducted with the three soils showed that both cold and dry conditions reduced fluometuron dissipation rates. In the laboratory under conditions favorable for dissipation, fluometuron had a half-life of 26 days in the Dundee silt loam, 43 days in the Loring silt loam, and 73 days in the Sharkey silty clay. In the field, dissipation was very rapid in the Loring silt loam compared to the Dundee silt loam and the Sharkey silty clay.
Response of Rotational Crops to Soil Residues of Chlorsulfuron
Authors: Peterson Mark A. , Arnold W. Eugene
Published: May 2019

The response of corn (Zea maysL. ‘Sokota TS 46’), flax (Linum usitatissimumL. ‘Culbert 79’), grain sorghum [Sorghum bicolor(L.) Merr. ‘Sokota 466’), soybeans [Glycine max(L.) Merr. ‘Corsoy 79’], and sunflowers (Helianthus annuusL. ‘Sokata 4000’) to soil residues 12 and 24 months after application of 17, 34, and 68 g ai/ha chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl) amino] carbonyl] benzenesulfonamide} was determined at two locations, Redfield and Watertown, in eastern South Dakota. All crops at Redfield were injured significantly at 17 g/ha, 12 months after application as determined by plant dry weight and visual evaluations. Corn and sorghum were the most susceptible while flax was the least susceptible. Injury at Watertown was significantly less than at Redfield. Differences in carryover were related to a lower soil pH at Watertown.
Combined Effect of Disease and Herbicide Treatment on Yield of Sugarcane (Saccharum officinarum)
Authors: Millhollon Rex W. , Koike Hideo
Published: May 2019

Sugarcane (Saccharum officinarumL.) was planted in the fall; the seed cane was healthy or infected either with sugarcane mosaic virus (strain H) or with ratoon stunting disease (RSD) (Clavibacter xyli). Herbicide treatments were applied the following spring and each subsequent spring during the 3-yr crop cycle. Hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione] at 1.1 kg ai/ha was applied as a soil foliage treatment when sugarcane was about 30 cm tall. The methyl ester of diclofop {(±)-2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} at 1.1 kg ai/ha and the sodium salt of asulam {methyl [(4-aminophenyl)sulfonyl] carbamate} at 3.4 or 3.8 kg ai/ha were applied as foliage treatments when sugarcane was about 90 cm tall. Both mosaic and RSD reduced yield of sugar/ha by 16% for the 3-yr crop, primarily by causing a decrease in stalk population. Hexazinone reduced yield of sugar/ha by 24% primarily by causing a decrease in both stalk population and sugar content of stalks. Diclofop reduced yield by 7% and asulam caused no significant yield loss. Combinations of disease and herbicide treatment reduced yields in an additive manner, with the combination of hexazinone and either mosaic or RSD causing a 38% reduction.
World Challenges in Weed Science
Authors: Eue Ludwig
Published: May 2019

All of us expect good food in adequate quantities. The question is how to reach this aim in the near future with an increasing world population (Table 1). A comparison of past figures with those forecast for the coming years tells us that in the near future the rate of population growth will greatly outpace the available arable land. Dietary energy requirements will increase. Consumption of grain crops will increase although on a smaller scale than in the past. The need for protein products will also continue to soar.
The Influence of Glyphosate on Bud Dormancy in Leafy Spurge (Euphorbia esula)
Authors: Maxwell Bruce D. , Foley Michael E. , Fay Peter K.
Published: May 2019

Glyphosate [N-(phosphonomethyl)glycine] was applied in the spring and fall to leafy spurge (Euphorbia esulaL. # EPHES) in the field at rates of 0.14 to 4.48 kg ai/ha. Fall applications of glyphosate at rates of 0.56 to 4.48 kg/ha stimulated axillary branching and caused an increase in the number of stems/m2by the end of the following summer in a dense population. This was a result of shoot growth from buds on the crown region of the root system. The absorption and translocation of14C-glyphosate applied to leaves of mature leafy spurge plants were evaluated at prebloom, full-bloom, and senescence phenological stages. Approximately 81% of the14C-glyphosate applied to the leaves of senescing plants was absorbed. There was a decrease in the proportion of14C translocated out of the treated leaf when applications were made after full bloom. Translocation of14C to the treated stem, nontreated stems, root crown, and roots did not differ with phenological stage in 1983. Translocation and concentration of14C in most plant parts in 1985 differed with phenological stage. Translocation to the crown buds as a percentage of the14C absorbed was highest at the senescence stage. At senescence and before soil freezing, leafy spurge crown buds demonstrate transient but active elongation toward the soil surface. This active development may account for the enhanced translocation of14C into the crown buds.
Response of a Red Fescue-Kentucky Bluegrass Turf to Three Consecutive Annual Applications of Amidochlor, Mefluidide, and Ethephon
Authors: Bhowmik Prasanta C.
Published: May 2019

A red fescue (Festuca rubraL.)- Kentucky bluegrass (Poa pratensisL.) turf was treated annually with amidochlor {N-[(acetylamino)methyl]-2-chloro-N-(2,6-diethylphenyl)acetamide} at 2.2, 2.8, and 3.4 kg ai/ha, mefluidide {N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl] amino] phenyl] acetamide} at 0.4 kg ai/ha, and ethephon [(2-chloroethyl) phosphonic acid] at 5.6 kg ai/ha for three consecutive years. Recuperative potential of treated turfgrass was determined in the field and in a greenhouse study. Amidochlor and mefluidide treatments injured turfgrass (11 to 64%) four weeks after application. However, turfgrass recovered after eight weeks. Amidochlor at 2.8 to 3.4 kg/ha and mefluidide at 0.4 kg/ha suppressed (75 to 100%) seedhead development. Ethephon at 5.6 kg/ha was ineffective. Turfgrass recovered normally each spring after amidochlor treatments, with no delay in spring green-up. Root length, root weight, and root:shoot weight ratio of the plugs from the greenhouse study were unaffected by three consecutive annual applications of amidochlor, mefluidide, and ethephon. One annual spring application of amidochlor, mefluidide, and ethephon for three consecutive years caused no adverse effects that would limit their use on red fescue-Kentucky bluegrass turf.
Use ofAlcaligenes eutrophusas a Source of Genes for 2,4-D Resistance in Plants
Authors: Perkins E. J. , Stiff C. M. , Lurquin P. F.
Published: May 2019

The soil bacteriumAlcaligenes eutrophusis able to degrade phenoxy herbicides such as 2,4-D [(2,4-dichlorophenoxy)acetic acid]. It has been shown that several degradative genes are located on a large plasmid harbored by this organism. We have demonstrated by HPLC and gas chromatography that 2,4-dichlorophenol is a major metabolite resulting from 2,4-D degradation byA. eutrophus.A portion of the large plasmid carrying the 2,4-D catabolic genes has been cloned and mapped by restriction endonuclease digestion. Overlapping subclones have been produced and were used in conjugation experiments in order to identify the first gene involved in 2,4-D detoxification. Once sequenced, this gene will be transferred to dicotyledonous plant cells using available vector systems.
Future Potential, Problems, and Practicalities of Herbicide-Tolerant Crops from Genetic Engineering
Authors: Goodman Robert M.
Published: May 2019

Genetic engineering is a powerful new technology that makes possible rapid development of herbicide tolerances in superior crop varieties. Use of the technology will have a major impact on future agricultural practices and the agrichemical industry. Possible risks as well as significant likely benefits – to agricultural users, corporate suppliers, and the environment – are discussed. Increased product lifetimes, decreased costs, and increased usefulness of broad-spectrum, high-potency, environmentally safe herbicides and herbicide combinations are predicted.
Influence of Soil Moisture on Shoot and Root Growth of Green and Yellow Foxtail (Setaria viridisandS. lutescens)
Authors: Nadeau Leonie B. , Morrison Ian N.
Published: May 2019

Shoot and root growth of green foxtail [Setaria viridis(L.) Beauv. # SETVI] and yellow foxtail [Setaria lutescens(L.) Beauv. # SETLU] were compared under three moisture regimes under simulated field conditions in 1982 and 1983. An increase in water supply from 0.3 to 2.5 cm/week resulted in proportionately greater increases in the number of tillers and leaf area of green foxtail compared to yellow foxtail. In 1982, green foxtail produced approximately three times as many seed as yellow foxtail under all three water regimes, whereas under warmer conditions in 1983, green foxtail produced nearly six times as many seed as yellow foxtail under the highest water regime and more than 11 times under the lowest regime. By using a specially constructed periscope to observe root growth through clear plastic tubes implanted in the soil it was determined that the amount of available moisture had much less effect on root growth than on shoot growth of the two species. In 1982, green foxtail tended to produce more roots than yellow foxtail early in the season but as the plants matured no significant differences occurred between species. In 1983, no significant differences in total root length occurred between species at any growth stage. The roots of both species penetrated to a depth of nearly 60 cm, with the highest concentration of roots occurring at depths of 20 to 30 cm.
Influence of Surfactants on the Toxicity of Asulam to Johnsongrass (Sorghum halepense) and Sugarcane (Saccharumsp.)
Authors: Richard Edward P.
Published: May 2019

The influence of surfactant type and concentration on the efficacy of asulam {methyl [(4-aminophenyl) sulfonyl] carbamate} for controlling rhizomatous johnsongrass [Sorghum halepense(L.) Pers. # SORHA] was evaluated in field and greenhouse studies. Under field conditions, nonoxynol (9 to 10 POE) [α-lp-nonylphenyl)-w-hydroxypoly (oxyethylene)] applied at concentrations of 6% (v/v) with asulam at 2.8 kg ai/ha reduced rhizomatous johnsongrass biomass by 35%, with no consistently significant difference in asulam's performance between surfactant concentrations of 0 and 3% (v/v) being observed. Asulam applied with nonoxynol at concentrations of 3 and 6% (v/v) reduced sugarcane (Saccharuminterspecific hybrids) yields and significantly offset any advantages from increased johnsongrass control. In greenhouse studies, where johnsongrass foliage was washed either 0, 1, 6, 24, or 48 h after treatment (HAT), the degree of johnsongrass control with asulam was generally not affected by the type of surfactant (paraffin-base petroleum oil-surfactant blend or alcohol-surfactant-water mixture) used. At least 48 h was needed to insure adequate basipetal translocation, hence maximum inhibition of rhizome regrowth with asulam applied alone. Increasing the surfactant concentration shortened this interval to 48 h (0.25%) to 24 h (0.5 to 1%) to 6 h (3%) to 1 h (6%).
Weed Control in Irrigated Seedling Alfalfa (Medicago sativa)
Authors: Wilson Robert G.
Published: May 2019

Spring-applied herbicides were evaluated in the field in 1982 through 1984 in western Nebraska for selective weed control in irrigated seedling alfalfa (Medicago sativaL. ‘Appollo’). Weed densities were least in plots treated preplant with benefin [N-butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)benzenamine] in combination with postemergence applications of 2,4-DB [4-(2,4-dichlorophenoxy) butyric acid]. Combinations of sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} with bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) and fluazifop-butyl {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} with bromoxynil provided less grass control than sethoxydim or fluazifop-butyl applied alone. Annual weeds did not reduce alfalfa stand density.
Comparison of Fall-Applied Pronamide with Spring-Applied Sethoxydim for Quackgrass (Agropyron repens) Control in Established Alfalfa (Medicago sativa)
Authors: Leroux Gilles D. , Harvey Robert G.
Published: May 2019

Established stands of alfalfa (Medicago sativaL.) at two field locations were treated at one date in the fall with pronamide [3,5-dichloro (N-1,1-dimethyl-2-propynil) benzamide] at 0.8 and 1.6 kg ai/ha and at two dates in the spring with sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} at 0.3 and 0.6 kg ai/ha for the control of quackgrass [Agropyron repens(L.) Beauv. # AGRRE]. Herbicide efficacy was compared by measuring botanical and chemical composition and yield of forage. Both chemicals suppressed quackgrass in first-cutting herbage. While sethoxydim at the higher rate was equivalent to pronamide for increasing the proportion of alfalfa in forage, pronamide was superior for increasing seasonal total yield. Late postemergence applications of sethoxydim were more effective for quackgrass regrowth control than earlier spring applications. Controlling quackgrass in late spring resulted in lower crude protein (CP) content in first-cutting forage than did controlling it in fall. Alfalfa competing with untreated quackgrass had a lower CP content than where quackgrass was controlled with herbicides. All herbicide treatments reduced the neutral-detergent fiber (NDF) of the herbage. As measured by the acid-detergent fiber (ADF) concentration of alfalfa, sethoxydim slightly retarded spring growth of the legume.
Crop Rotation and Herbicide Effects on the Population Dynamics of Two Annual Grasses
Authors: Johnson W. Carroll , Coble Harold D.
Published: May 2019

A 3-yr study was initiated in 1982 to determine the effects of herbicides and crop rotations on large crabgrass [Digitaria sanguinalis(L.) Scop. # DIGSA] and broadleaf signalgrass [Brachiaria platyphylla(Griseb.) Nash # BRAPP] population dynamics. Regardless of the crop rotation sequence, broadleaf signalgrass immediately became the predominant weed where standard herbicide programs were used. Large crabgrass became the predominant species after two growing seasons if no herbicides were applied. Domination by large crabgrass appeared to be due to greater seed production. The domination by broadleaf signalgrass in plots treated with herbicides was attributed to its tolerance to the primary grass herbicide alachlor [2-chloro-N-(2,6-diethylphenyl)-N-methoxymethyl)acetamide]. Broadleaf signalgrass emergence from soil treated with 2.2 kg ai/ha was not statistically different from that in untreated soil, while large crabgrass and fall panicum [Panicum dichotomiflorum(L.) Michx. # PANDI] emergence was significantly reduced at the same rate.
Absorption and Translocation of Sethoxydim with Additives
Authors: Nalewaja John D. , Skrzypczak Grzegorz A.
Published: May 2019

Experiments were conducted to determine14C absorption and translocation by oat (Avena sativaL. ‘Lyon’) foliarly treated with14C-sethoxydim {(2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one)} and various additives. Safflower (Carthamus tinctoriusL.), soybean [Glycine max(L.) Merr.], linseed (Linum usitatissimumL.), and sunflower (Helianthus annuusL.) oil all similarly increased foliar absorption and translocation of14C more than palm oil (Elaeis quineensisJacq.) but less than petroleum oil, when applied without an emulsifier. An emulsifier in the oil additive tended to enhance14C absorption and translocation more in soybean oil than petroleum oil so that14C absorption and translocation were similar with both oils containing emulsifiers. Absorption and translocation of14C tended to increase more with an increase in emulsifier concentration in soybean oil than in petroleum oil but not beyond 15% with either oil. Percentage of14C absorbed and translocated from14C-sethoxydim applied to oats increased as the amount of soybean oil applied increased from 2.3 to 4.6 L/ha, but the increase was less for sethoxydim at 0.87 kg ai/ha than at 0.03 or 0.17 kg ai/ha.
L-2-Oxothiazolidine-4-Carboxylic Acid Protection Against Tridiphane Toxicity
Authors: Hilton James L. , Pillai Parthasarathy
Published: May 2019

Tridiphane [2-(3,5-dichlorophenyl)-2-(2,2,2-trichloroethyl)oxirane] inhibited growth of seedling corn (Zea maysL. ‘DK T 1100’), wheat (Triticum aesetivumL. ‘Arthur’), and sorghum (Sorghum vulgarePers. ‘DK 42Y’) in growth chamber experiments. These inhibitions were partially circumvented by simultaneous treatment with OTC (L-2-oxothiazolidine-4-carboxylic acid). Tridiphane, atrazine [6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine], and OTC each increased levels of low molecular weight thiols (glutathione) in intact roots of treated corn seedlings, but only OTC did in excised roots. Tridiphane and atrazine caused a decrease in thiol content of excised roots. Tridiphane treatments reduced the amount of glutathioneS-transferase activity extractable from corn roots, and this reduction was circumvented partially by OTC applied in combination with tridiphane. These data present evidence that tridiphane interference with cysteine or glutathione metabolism can be reversed by increasing cellular content of cysteine.
Johnsongrass (Sorghum halepense) Control in Reduced-Tillage Systems
Authors: Langemeier Mark A. , Witt William W.
Published: May 2019

Fluchloralin [N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl)benzenamine], pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine], and trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine] either alone or in combination with fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy] propanoic acid}, haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, or sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} were evaluated for johnsongrass [Sorghum halepense(L.) Pers. # SORHA] control in reduced-tillage soybean [Glycine max(L.) Merr.] production systems. Data obtained in 1983 and 1984 near Lexington and Princeton, KY, indicated that johnsongrass could be effectively controlled. A single discing before application of the soil-active herbicides usually had no effect on johnsongrass control. Johnsongrass control was primarily dependent on foliarly applied herbicides. Preplant-incorporated treatments did not provide adequate johnsongrass control when used alone. Johnsongrass panicle numbers recorded in September corresponded to visual evaluations of control recorded earlier in the growing season. Soybean yield with all herbicide treatments was greater than with a nontreated control and was closely associated with the degree of johnsongrass control.
Fosamine Absorption and Translocation in Multiflora Rose (Rosa multiflora)
Authors: Mann Richard K. , Witt William W. , Rieck Charles E.
Published: May 2019

In a 2-yr field study, selective application of a 2.5% (v/v) solution of the ammonium salt of fosamine [ethyl hydrogen(aminocarbonyl)phosphonate] plus 0.5% (v/v) nonionic surfactant to multiflora rose (Rosa multiflora Thunb. # ROSMU) demonstrated leaves to be the major site of uptake for suppressing growth. In greenhouse studies, 14C-fosamine was absorbed in decreasing order by axillary bud, leaf, and stem treatments, respectively. 14C was rapidly translocated throughout multiflora rose plants when applied to leaf, stem, or bud tissue. The highest 14C concentration always occurred at the site of uptake. In a 32-day study, the treated leaf, the treated bud, and treated stem had the highest 14C concentration when 14C-fosamine was leaf, bud, or stem applied, respectively.
Identification and Distribution of the Weedy Spurges in the Delta of Mississippi
Authors: Elmore C. Dennis , McDaniel Sidney
Published: May 2019

The weedy spurges found in the Delta region of Mississippi, U.S.A., include spotted spurge (Euphorbia maculataL. # EPHMA), nodding spurge (Euphorbia nutansLag. # EPHNU), prostrate spurge (Euphorbia humistrataEngelm. ex Gray # EPHHT), creeping spurge (Euphorbia serpensH.B.K. # EPHSN), and hyssop spurge (Euphorbia hyssopifoliaL. # EPHHS). Nodding spurge was the most common while creeping spurge was the least common. Hyssop spurge, not previously known to be in Mississippi, was found in six of the 17 counties in the Delta of Mississippi. Hyssop spurge occurs with, and had previously been confused with, nodding spurge. Diagnostic characters, special identification features, and illustrations are provided to aid in identification of these five species of weedy spurges, which occur widely in the U.S.
Evaluation of Rust Fungi as Biological Control Agents of WeedyCentaureain North America
Authors: Watson Alan K. , Clement Michel
Published: May 2019

FourCentaureaspecies, diffuse knapweed (C.diffusaLam. # CENDI, spotted knapweed (C.maculosaLam. # CENMA), yellow starthistle (C.solstitatilisL. # CENSO), and the closely related Russian knapweed [Acroptilon repens(L.) DC. syn.Centaurea repensL. # CENRE] are serious introduced weeds which infest extensive areas of pasture and rangeland in Canada and the United States (1, 10, 14, 17, 18, 26, 30). Russian knapweed and yellow starthistle are also troublesome in cultivated land (1, 14, 26). These four species are members of the Cardueae tribe of the Asteraceae family and have been accidentally introduced from Eurasia as contaminants in crop seed.
Biological Control of Stranglervine in Citrus–A Researcher's View
Authors: Ridings W. H.
Published: May 2019

Stranglervine (Morrenia odorata Lindl. # MONOD) was identified in 1957 at a commerical citrus grove in Florida. It is believed that this plant pest was introduced into Florida as an ornamental plant from South America. In the early 1960's, it became recognized as a serious weed pest that competed with the citrus trees for sunlight, water, and nutrients; girdled tree limbs; and interfered with spraying, harvesting, and irrigation practices. By the 1970's the vine was distributed throughout most of the citrus-growing areas in Florida. Control measures were limited to herbicides and mechanical cultivation. It was estimated that the cost of controlling this pest was $124/ha/yr. In many instances, control measures were inadequate to keep the vines from becoming established in the trees (11, 12, 13). Studies reported by El-Gholl (4) further demonstrated the inherent ability of this weed to persist.
Fluctuating Temperatures Break Seed Dormancy of Catclaw Mimosa (Mimosa pigra)
Authors: Dillon Stephen P. , Forcella Frank
Published: May 2019

Because environmental factors facilitating the breaking of dormancy of seed of catclaw mimosa (Mimosa pigra L. ♯ MIMPI) under field conditions were unknown, the effect of constant temperatures (2 to 44 C) on germination of scarified and unscarified seeds, and the effect of diurnally fluctuating temperatures on unscarified seeds were examined. Temperatures fluctuated diurnally by 10 and 20 C in these latter experiments. Germination was less than 10% at all constant temperatures except 44 C, which had 40% germination. Scarification increased germination to 100% at constant temperatures greater than 12 C. Germination of unscarified seed was significantly lower (0 to 23%) when day/night temperature ranges fluctuated by 10 C than when they fluctuated by 20 C. Optimum temperature for germination was 40/20 C, where 93% germination occurred within 4 days.
Herbicides for Sod-Seeding Establishment of Alfalfa (Medicago sativa) in Quackgrass (Agropyron repens)-Infested Alfalfa Swards
Authors: Leroux Gilles D. , Harvey Robert G.
Published: May 2019

The herbicides 2,4-D [(2,4-dichlorophenoxy) acetic acid], dalapon (2,2-dichloropropionic acid), glyphosate [(N-phosphonomethyl)glycine], paraquat (1,1’-dimethyl-4,4’-bypiridinium ion), and pronamide [3,5-dichloro-(N-1,1-dimethyl-2-propynyl)benzamide] were applied at selected rates and dates to quackgrass [Agropyron repens(L.) Beauv. ♯ AGRRE]-infested alfalfa (Medicago sativaL.) sod in 1979 and 1980 to suppress vegetation for subsequent establishment of alfalfa without tillage. The influence of herbicides on weed control, alfalfa seedling density and visual stand, and forage yield and quality was assessed for 3 yr. During establishment, all herbicides except 2,4-D effectively controlled quackgrass. Glyphosate applied broadcast increasingly suppressed the existing sod as the rate was increased from 0.6 to 1.6 kg ai/ha. The effectiveness of herbicides as measured by total (old and new) plant density was closely related to the suppression of the sward. While the substitution of new alfalfa plants for old ones was not necessary under dense (40 plants/m2) alfalfa stands, completely controlling the vegetation with glyphosate resulted in sustained productivity throughout the experimental period. After 3 yr, alfalfa percentage and yield were highest when glyphosate was broadcast at 1.6 kg/ha. Improvement in forage quality, as estimated by the concentrations of crude protein and neutral-detergent fiber, was closely related to grass control.
Screening Procedures to Identify Soil-Borne Actinomycetes That Can Produce Herbicidal Compounds
Authors: DeFrank Joseph , Putnam Alan R.
Published: May 2019

An isolation and screening procedure was developed to identify soil actinomycetes that can produce germination and growth inhibitors on agar plates. Eight of 120 isolates tested demonstrated severe toxicity on cress (Lepidium sativumL. ‘Curly’) and barnyardgrass [Echinochloa crus-galli(L.) Beauv. ♯ ECHCG]. Several isolates were observed to stimulate growth. In replicated tests using the agar screening procedure, compounds produced by microorganisms significantly inhibited germination and growth of indicator plants. Organisms shown to produce toxins in agar media did not always produce toxins when grown in submerged culture.