Abstract
Trichogramma semblidis (Auriv.) has been recorded from eggs ofTabanus macer Bigot in India. Some aspects of the biology of this parasite have been studied. Males ofT. semblidis exhibit dimorphism, that is, alate and apterous forms are produced, the incidence of apterous forms depending on the host eggs from which they are reared. Males reared fromTabanus eggs are almost exclusively apterous. Dimorphism was studied using eggs of four unnatural hosts, namely,Achaea janata L.,Heliothis armigera Hubn.,Corcyra cephalonica St. andPhthorimaea operculella Zeller. Fewer apterous males were produced from eggs ofAchaea andCorcyra, than from those ofHeliothis andPhthorimaea, but it appears that quality of nutrition in the host egg controls dimorphism.
Published Version
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