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Trials of Organophosphorus and Carbamate Seed Dressings against Wheat Bulb Fly Leptohylemyia coarctata in 1966–68
Author(s) -
Griffiths D. C.,
Scott G. C.,
Maskell F. E.,
Roberts P. F.
Publication year - 1969
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1969.tb00460.x
Subject(s) - bulb , carbamate , biology , horticulture , toxicology , agronomy , biochemistry
SUMMARY Seed dressings of organophosphorus and carbamate insecticides, at 0⋅1 per cent and 0⋅5 per cent active ingredient to weight of seed, were compared with heptachlor and ethion standards for control of wheat bulb fly during 1966–68. Short rows of treated seeds were sown in autumn on sites infested with wheat bulb fly eggs, and sample plants were examined in spring. The effective new materials, judged by the percentage of damaged shoots and the percentage of plants containing live larvae, were R 42211 ( 0,0 ‐diethyl 0 ‐(2‐diethylamino‐6‐methyl‐pyri‐midin‐4‐yl) phosphorothioate), B 77488 ( 0,0 ‐diethyl phosphorothioate 0 ‐ester with phenylglyoxylonitrile oxime), B 80833 ( 0 ‐methyl 0 ‐3,4‐dichlorophenyl methyl phosphonothionate), ‘Dursban’ ( 0,0 ‐diethyl O ‐3,5,6‐trichloro‐2‐pyridyl phosphorothioate) and bromophos‐ethyl. However, both doses of ‘Dursban’ and bromophos‐ethyl. and the larger dose of B 80833 damaged young seedlings. There was only slight damage with the large dose of B 77488 and none with R 42211, so these two compounds were the most promising new materials tested.