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d.fasciatus

International Journal of Tropical Insect Science (1)

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Effects of diet change on the reproductive parameters of the cotton stainers Dysdercus cardinalis and D. fasciatus (Hemiptera: Pyrrhocoridae)
Beatrice Tengecho, Battan M. Khaemba
Journal:

Insect Science and Its Application / Volume 18 / Issue 3 / September 1998

Published online by Cambridge University Press:

19 September 2011, pp. 211-215

Print publication:

September 1998
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Diet change in the cotton stainers, Dysdercus cardinalis and D.fasciatus, occasioned by their migration from Gossypium hirsutum (cotton) to alternate hosts Sterculia rhynchocarpa and Adansonia digitata, was overall beneficial to their bionomics. Only the host Abutilon mauritianum appeared to possess antibiotic effects against the fecundity, fertility and longevity of the stainers. The occurrence in tropical natural ecosystems of both suitable and unsuitable hosts appears to constitute a vital and a viable stainer population-regulatory mechanism. Overall, D. cardinalis exhibited superior reproductive parameters on a variety of diets than did D. fasciatus. The latter apparently suffered profound negative effects on its bionomics when feeding on certain hosts.