Histopathological alteration in the ovaries of the desert locust Schistocerca gregaria (Forskal) induced by the IGR consult and Lufox

Abstract

Histopathological changes in the ovaries were tested in normal adult females and those developed from treated one day old of the fifth nymphal instar of the desert locust with (LC50) of Consult and Lufox. S. gregaria as well as other orthopterous insects has panoistic ovarioles, each ovariole is divided into a germarium and vitellarium; the gemarium contains the oogonia and the pre-follicular cells which surround the oocytes to form the ovarian follicles in the vitellarium; and is invested with non-cellular tunica propria and an outer cellular sheath (tunica externa). In the ovarian follicles of those females developed from the treated nymph with consult showed vacuolization of cytoplasm and degeneration of the cell components of follicular epithelium, oocytes were the most obvious signs of damage. Damage was pronounced in the ovarioles of these females developed from the treated nymphs with Lufox. Ovariole growth was stunted and vitellogenesis and chorion formation were completely inhibited.