EFFECT OF LATE INSTARS TREATMENT WITH JUVINILE HORMONE ANALOGUE PYRIPROXYFEN ON THE BIOLOGY OF GERMAN COCKROACH .

M.H.Abed-Ali,

	EFFECT OF LATE INSTARS TREATMENT WITH JUVINILE HORMONE ANALOGUE PYRIPROXYFEN ON THE BIOLOGY OF GERMAN COCKROACH .
The Iraqi Journal of Agricultural Science
Article 1, Volume 40, Issue 4, 2009, Pages 92-98
Author

Abstract
The effects of dietary juvenile hormone analoge pyriproxyfen were investigated on nymphs of German cockroaches , Blattella german (L.) . Laboratory studies of late instars feeded on treated diet with different concentrations of 0.001 , 0.025 , 0.05 , 0.125 , 0.25 mg pyriproxyfen / 10 mg diet showed three morphological phenotypes changes in both sexes ; the first , normal adults declined with the lower concentrations ; second abnormalities in wings formation such as divergent and curly wings that increased with high concentrations ; third , giant nymphs appeared at high concentrations . Also studies showed reduction in reproductive potential of normal females resulted from treated nymphs indicated by reduction of mean number of ootheca/ female , hatching of ootheca and inhibition of nymphs hatched by ootheca / female that reached to 100 percent at concentration 0.25 mg pyriproxyfen /10gm diet . Also the use of dietary juvenile hormone analogue caused the sterility of the normal and abnormal adults resulted from treated nymphs reached to 66.7 and 100 % respectively . Static analysis revealed a significant increase in sterility among normal and abnormal females at high concentrations . Also results indicated that the percent of sterility in abnormal females significantly greater than normal ones .

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