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The effect of repeated insecticidal applications on a natural tsetse population.

Published online by Cambridge University Press:  10 July 2009

D. Yeo  and
H. R. Simpson
D. Yeo
Affiliation:
Colonial Pesticides Research Unit, Arusha, Tanganyika
H. R. Simpson
Affiliation:
Rothamsted Experimental Station, Harpenden, England.
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Extract

Using a deterministic model of a tsetse population, theoretical calculations have been made of the effect of repeated applications of a non-persistent insecticide upon a natural population. It has been assumed that the insecticidal applications instantaneously reduce the adult population, and that there is no residual effect.

For the numerical work it has been assumed a female fly has a pupal period of four weeks and an average expectation of life of six weeks and produces her first larva three weeks after emergence, and subsequent ones at intervals of one-and-a-half weeks.

Results have been calculated for kills of females varying from 50 per cent, to 95 per cent, per application, for series of up to eight successive applications, and for intervals between successive applications of from one to six weeks and also for the case when the population is allowed to become stable between applications.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 51 , Issue 3 , November 1960 , pp. 631 - 637
Copyright
Copyright © Cambridge University Press 1960

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