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Laboratory and field trials to determine the modes of action of malathion and diesel oil against Culicoides furens (Poey) (Dipt., Ceratopogonidae)

Published online by Cambridge University Press:  10 July 2009

John B. Davies
John B. Davies
Affiliation:
Mosquito-Sandfty Research Unit, Ministry of Health, Jamaica
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Extract

One field and four laboratory trials were run to determine the reason for the success of 1–8% malathion in diesel oil in controlling Culicoides furens (Poey) in swamp mud in Jamaica. In the laboratory malathion and marine diesel oil (1:4000) was an effective larvicide for up to two days after application to the mud, but diesel oil alone gave only slight mortality even after six days. Judged by the emergence of adults, diesel oil gave 100% pupal mortality for five days and still showed some effect after four weeks; this effect was not improved by the addition of malathion. In the field, counts of emerging adults showed that diesel oil at 106–5 gal/acre gave 97–8% control of C. furens for up to eight weeks after application. It is concluded that, because of the possibility of pupicidal action, insecticides should be assessed on adult emergence rather than larval mortality.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 60 , Issue 3 , February 1971 , pp. 399 - 407
Copyright
Copyright © Cambridge University Press 1971

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