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Responses of Pests to Fumigation. V.—The Toxicity of the free and sorbed Vapours of BHC and DDT to some Insects infesting Stored Products*

Published online by Cambridge University Press:  10 July 2009

M. Maqsud Nasir
M. Maqsud Nasir
Affiliation:
Imperial College Field Station, Sunninghill, Berks.
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Extract

Both p, p′DDT and a sample of commerical DDT have been compared with γ BHC as insecticides acting in the vapour phase. Both the direct fumigant action of the insecticides and the toxicity of the vapours sorbed on to stored products have been examined. After storage in atmosphere saturated with the vapours for six months, wheat retained sufficient of all three insecticides to control adults of Calandra graria (L.) and inhibit the develpment of larval Sitotroga ceraalella (Ol.). This control and inhibition was complete for BHC, and stronger for commercial than for p, p′DDT. Similar results were obtained when the insecticides sorbed on flour were tested using the eggs or larvae of Tribolium confusum Duv., or when fumigated groundnut kernels were tested against T. confusum, but such groundnut produced little toxic action against Oryzaephilus surinamensis (L.).

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 45 , Issue 3 , September 1954 , pp. 639 - 646
Copyright
Copyright © Cambridge University Press 1954

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