Biological studies of a new greenbug biotype
WebThe full complement of known greenbug, Schizaphis graminum (Rondani), biotypes found in the USA were subjected to a molecular phylogenetic analysis based on a 1.2-kb … WebApr 1, 1993 · Greenbug, Schizaphis graminum (Rondani), an important vector of barley yellow dwarf mosaic virus, is a major pest of cereals in many countries. A preliminary survey conducted in the Punjab and North Western Frontier Province of Pakistan revealed medium to heavy infestations at Charsadda (density 12 apterous greenbugs/25 plants), Sher …
Biological studies of a new greenbug biotype
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WebIn this study, 26 sorghum accessions from 12 countries were evaluated for both resistance to greenbug biotype I and genetic diversity using fluorescence-labeled amplified fragment length polymorphism (AFLP). Twenty-six AFLP primer combinations produced 819 polymorphic fragments indicating a relatively high level of polymorphism among the ... WebA greenbug ( Toxoptera graminum (Rondani)) biotype has developed in greenhouse cultures at Stillwater, Okla. It is capable of destroying the resistant wheat lines Dickinson …
WebJul 10, 2009 · Extensive molecular genetic variation was found among biotype E clones, despite a lack of variation in additive genetic traits. Thus, biotype E populations are made … WebAntibiosis was assessed using the intrinsic rate of increase (rm) of greenbugs confined to each of the three genotypes. Neither parent nor the resistant progeny expressed antibiosis. Mean rm values for greenbug I on Wichita (0.0956), and Ae. tauschii (0.10543) were not significantly different. Mean rm values for Wichita and 97-85-3 were also ...
Web'Arthropod Biotypes' published in 'Plant Resistance to Arthropods' WebTaylor Medwig-Kinney receives Stony Brook's 2024 President's Award to Distinguished Doctoral Students. Students Taylor Medwig-Kinney and Shruti Iyer win GSO …
WebOct 17, 2024 · As biotype shifts may occur, rendering previously efficient genes, susceptible to the new biotypes, agricultural entomologists should undertake regular and systematic …
WebFeb 23, 2024 · Greenbug ( Schizaphis graminum, Rondani) is a serious insect pest in many wheat growing regions and has been infesting cereal crops in the USA for over a … der marathon paterWebMay 1, 2008 · Greenbug is classified into biotypes A through K, plus isolates identified in New York, Kansas, Texas, and Florida (Nuessly et al. 2008; Burd and Porter 2006;Porter et al. 1997). Biotypes E and... der marathon-mannWeb1. Biotype-C was still the prevalent biotype, appearing in 8 of the 13 counties. Results of the biotype survey for Kansas for 1981 appear in Fig. 2. Biotype-E was found, on either wheat or grain sorghum, in 23 of 24 counties sampled. The 1981 survey indicates that biotype-E greenbug displaced, or is in the process of displacing, biotype-C in ... chronology of john grisham booksWebGreenbug, Schizaphis graminum (Rondani), populations over-summering on noncultivated grass hosts may be implicated in early fall infestations in wheat. The purpose of this study was to examine the relationship between over-summering greenbugs on noncrop hosts and fall infestations on wheat. Since greenbug populations on noncultivated hosts may also … dermarite bordered foam wound dressingWebDec 1, 1961 · It is capable of destroying the resistant wheat lines Dickinson Sel 28-A., and C. L. 9058. When cultured on Dickinson Set 28-A for eight generations, greenbugs collected from field populations decreased in size, fecundity, and longevity, … dermarest eczema medicated lotion 4 oz bottleWebSeveral studies revealing multiple QTL for greenbug resistance in different genetic resistance sources have been conducted against greenbug biotypes C, E, I, and K. Three loci present on SBI-05, SBI-06, and SBI-07 conferring resistance to greenbug biotype I were ... Biological control methods involve using naturally occurring pests or diseases ... dermarest medicated gelWebSep 1, 2024 · Greenbug, Schizaphis graminum (Rondani), is a chronic problem for small grains on the Southern Plains. Central to the pest status of greenbug is the occurrence of resistance-breaking biotypes. Rsg1 and Rsg2 are the only two genes for resistance of barley, Hordeum vulgare L., to greenbug. Only Rsg1 has been deployed in cultivars. … derma roller 0.25 how often