Results 211 to 220 of about 2,821 (237)

Aphid colonization of spring cereals

Annals of Applied Biology, 1973
SUMMARYIn 1970‐1, Metopolophium dirhodum, Rhopalosiphum padi and Sitobion avenae were the commonest alatae trapped from April/May to August, with most in July and early August. The first alatae appeared in the Rothamsted survey suction trap 0–34 days before aphids were found on the cereals, but during May and June no relationship was found between the ...
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Mapping resistance to cereal aphids in barley

Theoretical and Applied Genetics, 1997
A set of 150 doubled-haploid (DH) barley (Hordeum vulgare L.) lines derived from the cross of Harrington/TR306 was used to determine the number and chromosomal location of quantitative trait loci (QTLs) controlling resistance to cereal aphids. The experiments were conducted under natural infestation in the field during two growing seasons: 1994 and ...
S. Moharramipour, H. Tsumuki, K. Sato, H. Yoshida   +3 more
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Cereal aphids on maize in southern England

Annals of Applied Biology, 1982
SUMMARYIn 1978, 1979 and 1980, counts were made of the numbers of cereal aphids on a maize crop near Fordingbridge, Hampshire, England. Maize plants were selected away from the edge of the crop and the number, morph, species and feeding site of the aphids were recorded. Metopolophium dirhodum and Rhopalosiphum padi were found at densities that exceeded
S. C. HAND, J. R. CARRILLO
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Ear structure and the resistance of cereals to aphids

Crop Protection, 1984
Abstract In 1977 and 1978 in the field the cereal aphid Sitobion avenae F. (Hemiptera:Aphididae) was a pest on winter wheat (cv. Maris Huntsman), but was rare on winter barley (cv. Maris Otter). The results of laboratory experiments can only partly account for this observation.
Shirley J. Watson, A.F.G. Dixon
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Density dependence in cereal aphid populations

Annals of Applied Biology, 1996
SummaryLong sequences of data on the incidence of cereal aphids from five European countries were analysed for evidence of density dependent processes occurring between years. Using a randomisation test (Pollard, Lakhani & Rotheray, 1987), density dependence was revealed in all (16) population censuses of Metopolo‐phium dirhodum, 60% of ...
M J. MAUDSLEY, A. MACKENZIE, J I. THACKER, A F G. DIXON   +3 more
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Forecasting of cereal aphid abundance

2020
A.F.G. Dixon, J.C. Entwistle, M.T. Howard   +2 more
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Aphids on cereals

EPPO Bulletin, 2007
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Cereal aphids

1992
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Virulence of Verticillium lecanii (Z.) against cereal aphids; does timing of infection affect the performance of parasitoids and predators?

Pest Management Science, 2013
Simon R Leather
exaly  

Forecasting migration of cereal aphids (Hemiptera: Aphididae) in autumn and spring

Journal of Applied Entomology, 2009
B Hau, H -M Poehling
exaly