Results 11 to 20 of about 2,821 (237)
Studies on Polyphagous Predators of Cereal Aphids
The Journal of Applied Ecology, 1979 1. Experiments were done in fields of winter wheat at North Farm, West Sussex, and at Rothamsted in 1978 to investigate the effect of predation by carabid beetles and other polyphagous preadtors on populations of cereal aphids. 2. Predator populations were manipulated by pitfall trapping within plot surrounded by polythene barriers and by applying an ...
Edwards, C. A. +2 more
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Infection of cereal aphids by the fungus Entomophthora
Annals of Applied Biology, 1973 SUMMARYThree species of Entomophthora killed many Metopolophium dirhodum, M. festucae and Sitobion avenae on wheat at Harpenden, Hertfordshire, in 1971. Rainfall was low and aphid numbers were small in May and there was no Entomophthora infection. E. planchoniana first infected M. dirhodum early in June and the percentage of each aphid species infected
Dean, G. J. W., Wilding, N.
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Annals of Applied Biology, 1974 For most of this century, aphids have been known to infest cereals, but their potential importance does not seem to have been fully appreciated until the early 1950s when they were found to be vectors of barley yellow dwarf virus (Bruehl, 1961). Although this discovery initiated a great deal of research in many countries, especially in North America ...
Dean, G. J.
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The overwintering and abundance of cereal aphids
Annals of Applied Biology, 1974 SUMMARYThe longevity of Sitobion avenae varied inversely with temperature from 25 to over 100 days when reared outdoors on barley under lantern jars, being longest between December and April–May. This was due mainly to changes in the length of the pre‐ and post‐reproductive periods rather than the length of the period of reproduction.
Dean, G. J.
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Distribution of aphids in cereal crops
Annals of Applied Biology, 1970 SUMMARYCereal crops were examined weekly for aphids during 1969. Plants in twenty samples of row 0.3 m long were examined in a sheltered perimeter of a crop and along a transect 36.6 m into the crop. Aphids were usually first found within 1–4 weeks of the first alatae caught in a suction trap operating 12.2 m above ground. When first alatae caught in a
Dean, G. J., Luuring, B. B.
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The natural enemies of cereal aphids
Annals of Applied Biology, 1975 Dean, G. J.
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The landscape context of cereal aphid–parasitoid interactions [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2005 Analyses at multiple spatial scales may show how important ecosystem services such as biological control are determined by processes acting on the landscape scale. We examined cereal aphid–parasitoid interactions in wheat fields in agricultural landscapes differing in structural complexity (32–100% arable land).
Thies, Carsten +2 more
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Species composition of microorganisms of the trophic chain: Cereal plants – aphids [PDF]
Известия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, 2022 The article is devoted to the study of the species composition of microorganisms of the trophic chain: cereal plants – aphids. The objectives of the study were to determine the species composition, occurrence index and quantitative indicators of ...
Dymnich , Antonina S. +1 more
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Survey of Entomopathogenic Fungi and Parasitoids on Two Aphid Species on Wheat Crop in Gharbia Governorate, Egypt [PDF]
Journal of Plant Protection and Pathology, 2018 The present work was carried out during two successive wheat growing seasons, being 2015/16 and 2016/17 in three locations, Gharbia governorate to survey the cereal aphids and their natural enemies.
M. El-Sheikh, I. El-Shami
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Population dynamics and associated factors of cereal aphids and armyworms under global change. [PDF]
Sci Rep, 2015 Studying the impacts of global change, which comprises largely climate and landscape changes, on agricultural pests is crucial for developing sustainable pest management.
Wang L, Hui C, Sandhu HS, Li Z, Zhao Z.
europepmc +2 more sources