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Investigations on the use of dichlorvos in the control of the mushroom phorid, Megaselia halterata (Wood)
Author(s) -
HUSSEY N. W.,
HUGHES J. T.
Publication year - 1964
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.1744-7348.1964.tb01177.x
Subject(s) - dichlorvos , biology , mushroom , toxicology , horticulture , botany , pesticide , agronomy
SUMMARY Concentrations of dichlorvos (2,2‐dichlorovinyl dimethyl phosphate), lethal to mushroom flies, were produced in cropping houses by automatic aerosols, application of emulsion to the floors and by slow vaporization from a solid formulation in a plastic resin. Techniques used to measure these aerial concentrations and determine any residues in mushrooms are described. A concentration–time product of 0·7 μg./1./hr. was found completely effective. No residues were found in mushrooms grown in houses treated with dichlorvos aerosols at rates up to 600 mg./100 cu.ft. but in laboratory tests residues of the order of 1 p.p.m. persisted for 24 hours when the mushrooms were directly exposed to the aerosol. The aerial concentrations of dichlorvos used were well below the mammalian safety level of 1·0 μg./1.