Histopathological effect of some insecticides on the Male reproductive system of Sarcophaga ruficornis Fabricius (Diptera: Sarcophagidae)

Abstract

The ovariole of S. ruficornis consists of polytrophic ovarioles and the vitellarium contains an average of two egg chambers in which both the developing oocyte and trohpocytes or nurse cells are enclosed by cuboidal epithelium of follicle cells. The trophocytes are generally triangular shaped cells containing spherical nucleus. A number of nucleolus is seen within each trophocyte nucleus. Sub lethal dose of dieldrin caused considerable damage to the nucleus of the trophocytes leading to the pycnosis or clumping of the nucleus, but no such change has been seen in the nucleus of trophocytes treated with sub lethal dose of cypermethrin and malathion. Sub lethal dose of dieldrin, cypermethrin, and malathion affect the normal vitellogenesis resulting in reduced deposition of yolk in ooplasm which show vacuolization at number of places. Follicular epithelial cells treated with sub lethal dose of dieldrin, cypermethrin and malathion show necrosis and thinning at number of places. The nuclei of follicular epithelial cells show pycnosis due to the effect of insecticides. The thinning of follicular epithelial cells cause detachment from the oocyte in case of ovarioles treated with cypermethrin.