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外文期刊>Pesticide science
>The insecticidal activity of diethyl and dimethyl analogues of azinphos, bromophos, carbophenothion and parathion on glass surfaces and in soil
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The insecticidal activity of diethyl and dimethyl analogues of azinphos, bromophos, carbophenothion and parathion on glass surfaces and in soil
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机译：The insecticidal activity of diethyl and dimethyl analogues of azinphos, bromophos, carbophenothion and parathion on glass surfaces and in soil
AbstractThe insecticidal activity of dimethyl and diethyl forms of parathion, carbophenothion, bromophos and azinphos on glass surfaces and in soil was assessed by bioassay with adult vestigial wingedDrosophila melanogaster(Meig.). Both on glass and in soil there were large differences in the initial toxicities of the four different pairs of insecticides, but little difference between diethyl and dimethyl forms of each compound. In soil, toxicity was influenced greatly by soil type and moisture content, decreasing in the order moist sand = dry sand>moist clay‐loam>dry clay‐loam>dry peat>moist peat. Some of these effects may have been caused by differences in the behaviour of insects confined with moist or dry treated soils.In sterilised or unsterilised moist clay‐loam, diethyl forms of three of the four compounds remained toxic longer than their dimethyl counterparts. Possibly such differences could account for the greater effectiveness of certain diethyl compounds in field control of soil insect
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