Abstract
AbstractSymbiote investigation and insecticide resistance. Light microscopical and electron microscopical contribution for clarification of the insecticide resistance of the aphids under consideration of the mycetome symbiotes of the Myzus persicae Sulz.After treatment with insecticides the number of large sized symbiotes in resistant insects was larger in comparison to normally susceptible insects; but the average number of the symbiotes of resistent insects was less than of normally susceptible ones, probably as a result of inhibition of division activity of the symbiotes. The nuclei and nucleoli of the mycetocytes of the resistant insects are significantly larger than the same of the controls. The different behaviour of the mycetome and its symbiotes of the resistant and the normally susceptible aphids justifies the supposition, that the symbiotes play an important role in development and maintenance of ethylparathion resistance. Histochemical studies of the different ferment activities of the resistant and the normally susceptible aphid populations are necessary for further clarification of the importance of the symbiotes to insecticide virulence.
Published Version
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