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Chemical control of frit fly on winter cereals sown after grass
Author(s) -
FRENCH N.,
NICHOLS D. B. R.,
WRIGHT A. J.,
GREEN D. I.,
GREEN D. B.,
FENLON J. S.
Publication year - 1988
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.1744-7348.1988.tb03301.x
Subject(s) - biology , chlorpyrifos , crop , agronomy , toxicology , yield (engineering) , cypermethrin , oxamyl , horticulture , chemical control , pesticide , materials science , metallurgy
SUMMARY From 1978 ‐ 1985, 14 trials were conducted, mainly in Northern England, to assess the efficacy of different insecticides, formulations and application times for the control of frit fly ( Oscinella frit ) on winter cereals (13 on winter wheat and one on winter barley). Treatments were compared by assessing shoot damage in December‐January, numbers of healthy tillers in April and harvested yield. A chlorpyrifos spray to the grass before ploughing or at crop emergence gave the most consistently good results, significantly reducing damage and increasing yield by 0·61 and 0·31 t/ha respectively when taken over all trials. Sprays or granules of other insecticides applied from before drilling to 8 wk after emergence gave variable but sometimes good control and enhanced yield. Chlorpyrifos applied from crop emergence to 8 wk after emergence was generally more effective than other insecticides. Cypermethrin at emergence or 2wk later gave promising results in the two trials where it was used. Of the seed treatments fonofos was the most effective though it did not match the spray treatments. In additional trials, where insecticides were applied after damage occurred, sprays of chlorpyrifos and pirimphos‐methyl reduced damage and increased yield.