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The susceptibility of Myzus persicae and Brevicoryne brassicae to 14 C‐phorate in artificial diets
Author(s) -
GALLEY BY D. J.,
GOHAIN RUMA
Publication year - 1981
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1981.tb05135.x
Subject(s) - myzus persicae , brevicoryne brassicae , phorate , biology , honeydew , dew , botany , zoology , pest analysis , aphid , pesticide , agronomy , homoptera , aphididae , physics , condensation , thermodynamics
SUMMARY Colonies of Myzus persicae and Brevicoryne brassicae were established on artificial diets and the honeydew produced by them collected on aluminium foils. The diets were later exchanged for others containing a range of 14 C‐phorate concentrations. The honey‐dew produced while feeding on the treated diets was collected separately and mortalities were recorded. The diets, aphids and their honeydew were subsequently analysed. About 1.6% of the doses applied initially were found in the diets at the end of the bio‐assay period. Thin‐layer chromatography of diets containing LC 50 concentrations of insecticides showed that phorate and its metabolites were present in similar proportions. The LC 50 values were 15.5 nM and 277 nM phorate equivalents for B. brassicae and M. persicae respectively.