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H. Belefantmiller ; D. Porter ; M. Pierce ; A. Mort | 1994During early stages of infestation by Russian wheat aphids (Diuraphis noxia [Mordvilko]; RWAs), barley (Hordeum vulgare L.) leaf cells collapsed and showed autofluorescence in the mesophyll and bundle sheath adjacent to the RWA stylet sheath. Th[...]
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J. Webster ; D. Porter ; J. Burd ; D. Mornhinweg | 1996The Russian wheat aphid, Diuraphis noxia (Mordvilko), is a serious pest of barley in western North America. To help manage this pest, a Russian wheat aphid-resistant germplasm line STARS-9301 B was recently released to barley breeders for incorp[...]
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D. Hays ; D. Porter ; J. Webster ; B. Carver | 1999The feeding behavior of virulent and avirulent greenbug biotypes after preconditioning of the plant with virulent and avirulent greenbug biotypes was examined. A pair of near-isolines of barley, Hordeum vulgare L., differing by the antibiosis gr[...]
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D. Porter ; J. Burd ; K. Shufran ; J. Webster ; G. Teetes | 1997Future advances in wheat, Triticum aestivum L., and sorghum, Sorghum bicolor (L.) Moench, resistance to greenbug, Schizaphis graminum (Rondani), will likely come from introduction of resistance transgenes into high-performance cultivars. First-g[...]
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H. Miller ; D. Porter ; J. Burd ; D. Mornhinweg ; R. Burton | 1994A resistant barley (Hordeum vulgare L., PI 366450) was used to compare physiological responses of a susceptible barley ('Morex') to the recently introduced pest, Russian wheat aphid, Diuraphis noxia (Mordvilko). As measured by chlorosis, leaf ro[...]
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J. Webster ; D. Porter | 2000Several biotypes of the greenbug, Schizaphis graminum (Rondani), attack winter wheat, Triticum aestivum L., on the Southern Plains every year. Two wheat germplasm sources of resistance ('Largo' and 'GRS 1201') have teen developed that provide pr[...]
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One of several symptoms of Russian wheat aphid (RWA) [Diuraphis noxia (Mordvilko)] damage in susceptible barley (Hordeum vulgare L.) is white or chlorotic streaking of the leaf. Current methods use several symptoms to qualitatively rate damage. [...]
