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Laboratory evaluation of malathion for controlling the desert locust, Schistocerca gregaria (Forsk.)

Published online by Cambridge University Press:  10 July 2009

Hafiz Ahmed
Hafiz Ahmed
Affiliation:
Department of Biology, Queen Elizabeth College, London, W.8
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Extract

Experiments were carried out to remove existing doubts about the toxicity (and therefore cost per unit killing power) of malathion to adults of Schistocerca gregaria (Forsk.) which have arisen from earlier field and laboratory tests. Malathion is shown to be almost as toxic to these insects as γ-BHC, but superior in speed of action. These observations are in agreement with the performance of these two compounds in the field.

Subdivision of a dose of malathion with simultaneous application at two loci increased its toxicity. This, as well as other factors, brings the value of LD50 determinations into question. Recommendations for large-scale use of new insectsicides, based only on laboratory data, may not always be reliable.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 59 , Issue 1 , July 1969 , pp. 113 - 117
Copyright
Copyright © Cambridge University Press 1969

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