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FERTILITY AND SURVIVAL OF ACHAEARANEA TEPIDARIORUM (ARANEIDA: THERIDIIDAE) ON A DIET OF CHEMOSTERILIZED MOSQUITOES

Published online by Cambridge University Press:  31 May 2012

G. K. Bracken  and
C. D. Dondale
G. K. Bracken
Affiliation:
Research Institute, Canada Department of Agriculture, Belleville, Ontario
C. D. Dondale
Affiliation:
Research Institute, Canada Department of Agriculture, Belleville, Ontario
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Abstract

Fertility of Achaearanea tepidariorum (C. L. Koch) that were fed mosquitoes chemosterilized by pupal exposure to thiotepa was significantly reduced. Mortality was excessive for spiders fed mosquitoes treated topically with thiotepa. Maximal weekly dosages, estimated by residue analysis, were 12 and 21 ng/male and female respectively for spiders fed mosquitoes treated as pupae and over 3 times greater for spiders fed mosquitoes treated topically as adults. The susceptibility of this predator to small chronic dosages of chemosterilant suggests that mass releases of chemosterilized insects are potentially hazardous to food chain components.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 11 , November 1972 , pp. 1709 - 1712
Copyright
Copyright © Entomological Society of Canada 1972

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