Reduction of desert locust Schistocerca gregaria (Orthoptera : Acrididae)‎ fecundity after pyriproxyfen treatment

الملخص EN

Desert locust Schistocerca gregaria Forskål (Orthoptera: Acrididae) 5th nymphal instar, were feed on Egyptian clover treated with five pyriproxyfen concentrations (1000, 500, 250, 125 and 62.5 ppm).

Such treatments caused mortality ranged between 36.67 and 93.33 % after 7 days, while the mortality in control treatment was 3.33%.

Also, the treatments caused different degrees of molting failure.

The percentages of adult emergence ranged between 6.67 and 63.33%.

The maturation period of treated adult significantly prolonged in compare with untreated ones.

Moreover, pyriproxyfen caused significant reduction in the egg production, also different degrees of destruction into oocytes of treated females when examined under light microscope.