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- W2394234397 abstract "Three dosages of five kinds of pesticides,phoxim,beta-cypermethrin,pirimicarb,avermectins and imidacloprid,were sprayed in different periods to study their effectiveness in controlling Sitobion avenae(Fabricius) and Rhopalosiphum padi(Linnaeus) .Pesticide residue analysis was also conducted.The results show that the control effect of different doses of all five pesticides after the first spraying were 80% on day 1,90% and 84% on day 3,95% and 92% on day 5,respectively.There were significant differences(P0.05) between different kinds and doses of pesticides.The control effect of all pesticides on S.avenae was 90% from day 1 to day 5 after the second spraying.Compared with the control,the growth rate per 1000 grains was 2.02%-11.93% after the first spraying and 8.01%-15.87% after the second.Pesticide residues did not exceed the threshold for human consumption after the first spraying,which occurred at the end of the winter wheat flowering stage,and after the second spraying,which occurred after a 5 d interval in the middle of winter wheat filling stage.Spring wheat showed similar results.However,when the second spraying occurred during the milky stage rather than the middle of the wheat filling stage,residues of beta-cypermethrin and imidacloprid reached or exceeded national threshold limits for these chemicals." @default.
- W2394234397 created "2016-06-24" @default.
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- W2394234397 date "2011-01-01" @default.
- W2394234397 modified "2023-09-25" @default.
- W2394234397 title "Evaluation of the toxicity of five types of pesticides to wheat aphids and pesticide residue on seeds" @default.
- W2394234397 hasPublicationYear "2011" @default.
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