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The effects of sowing date and choice of insecticide on cereal aphids and barley yellow dwarf virus epidemiology in northern England


, : The effects of sowing date and choice of insecticide on cereal aphids and barley yellow dwarf virus epidemiology in northern England. Annals of Applied Biology 117(1): 31-43

During the mid-1980s, Sitobion avenae becaome recognised as an important vector of barely yellow dwarf virus (BYDV) in the Vale of York. A field trial at the University of Leeds Farm, North Yorkshire, was carried out during the autumn/winter of 1984-85 to evaluate different control procedures against S. avenae-transmitted BYDV and to investigate its epidemilogy. Winter barley was sown on three dates in September, and plots were sprayed with either deltamethrin, demeton-S-methyl or pirimicarb on one of three dates between mid-October and mid-November, making a factorial design. Rhopalosiphum padi, the main vector of BYDV in southern England, was rarely found during the experiment, but the numbers of S. avenae were much higher, reached a peak of 21% of plants infested in the unsprayed plots of the first sowing date. Single applications of each insecticide reduced populations of S. avenae to zero. Some treatments, particularly in the early sown plots and those treated with pirimicarb, however, did allow some recolonisation, and thus led to increased virus incidence and decreased yields. Sprays applied before the end of the migration of S. avenae were more efficient at controlling BYDV if the insecticide was persistent, otherwise a spray after this period, in November, was more effective. Virus incidence, although reduced by sprays, was generally low in plots sown on 18 and 27 September. In contrast, about 11% of plants were infected in unsprayed plots sown on 6 September and a small yield benefit was obtained with insecticidal treatments. Enzyme-linked immunosorbent assay (ELISA) of plants taken from the plots indicated tha MAV- and PAV-like strains were present, and were most likely to have been transmitted by S. avenae.

Accession: 002249509

DOI: 10.1111/j.1744-7348.1990.tb04192.x

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Related references

Mcgrath P.F.; Bale J.S., 1990: The effects of sowing date and choice of insecticide on cereal aphids and barley yellow dwarf virus epidemiology in northern england uk. During the mid-1980s, Sitobion avenae becaome recognised as an important vector of barely yellow dwarf virus (BYDV) in the Vale of York. A field trial at the University of Leeds Farm, North Yorkshire, was carried out during the autumn/winter of 19...

Mcgarth P.F.; Bale J.S., 1989: Cereal aphids and the infectivity index for barley yellow dwarf virus bydv in northern england uk. Suction traps at Leeds University Farm, N. Yorkshire, monitored aerial populations of cereal aphids over three autumns. Different migration patterns were observed between the four main species, Sitobion avenae, Metopolophium dirhodum, Rhopalosiphu...

McGrath, P.F.; Bale, J.S., 1989: Cereal aphids and the infectivity index for barley yellow dwarf virus (BYDV) in northern England. Suction traps at Leeds University Farm, N. Yorkshire, monitored aerial populations of cereal aphids over three autumns. Different migration patterns were observed between the four main species, Sitobion avenae, Metopolophium dirhodum, Rhopalosiphu...

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