Histopathological effect of some insecticides on the Male reproductive system of Sarcophaga ruficornis Fabricius (Diptera: Sarcophagidae)
Flesh flies belonging to the family Sarcophagidae are of considerable medical and veterinary importance, being responsible for various types of myiasis. During the present study, effect of sub lethal dose of four insecticide Dieldrin (0.0007%), Fenthion (0.01%), Carbaryl (0.01%) and Deltamethrin (0.05%) had been investigated on testis of Sarcophaga ruficornis. Spermatogonia and spermatocyte of the testis became pycnotic and gradually degenerated after treatment with sub lethal dose of dieldrin and fenthion but effect was less pronounced after treatment with carbaryl and deltamethrin. The testicular epithelia had gone thinning and folding after treatment with these insecticides. But in case of dieldrin treated testis, the testicular epithelium had undergone detachment from the main testicular tissue, indicating complete lysis of tissue below the epithelium. Sub lethal dose of these insecticides caused degeneration of spermatids and sperm bundle containing spermatozoa of testis. A number of vacuoles or spaces appeared due to lysis of tissue in transformation zone.