Abstract
Histopathological changes in the testes were tested in normal adult males and those developed from treated one day old of the fifth nymphal instar of the desert locust with (LC50) of Consult and Lufox. Both testes are formed each of numerous testicular follicles containing germ cells in different stages of development. Certain aspects of spermatogenesis in the desert locust S. gregaria are described in this work using light microscop. Spermatogenesis commences by the division of spermatogonia giving spermatocyes which in turn give spermatids. The transformation process of spermtid to sperm involves several morphological reorganization of the cells. The testicular follicles of those males developed from treated one day old of the 5 th nymphal instar with Consult (LC50) showed damage in zones of reduction and transformation and degeneration and necrosis appeared in many spermatids and spermatozoa. However those testicular follicles of males developed from treated 1 day old of the 5 th nymphal instarr with Lufox LC50 showed severe degeneration and necrosis of the most spermatogenic stages.
Highlights
The aim of the present study is to examine the histopathological changes occurred in the testes of the male S. gregaria developed from treated 1 day old of the 5th nymphal instar with sublethal concentration (LC50) of two compounds of insect growth regulators; Consult and Lufox
Consult and Lufox have proved to be toxic to one day old of 5th nymphal instor S. gregaria (Bakr et al 2009). 3- Experimental insects: The First day of the 5th nymphal instar of S. gregaria were treated with the estimated LC50 of Consult and Lufox
Each testes is formed of tubular, each follicle is enclosed by a layer of epithelial cells
Summary
Schistocerca gregaria (Forskal) have been recognized as a threat to agricultural production in Africa and Western Asia for thousands of years.IGRs are diverse groups of chemical compounds that are highly active against immature stage of insects and have a good margin of safety to most non-target biota including invertebrates, fishes, birds and other wild life, they are safe to man and domestic anin1als, they will play an important role in control programs in the future (Mulla, 1995).The main types of insect growth regulators used commercially are juvenile hormone analogues and chitin synthesis inhibitors (Parrella and Murphy,1998).Histological studies of gonads may provide morphological evidence for functions of gonial, extragonial tissues and cells.The aim of the present study is to examine the histopathological changes occurred in the testes of the male S. gregaria developed from treated 1 day old of the 5th nymphal instar with sublethal concentration (LC50) of two compounds of insect growth regulators; Consult (chitin synthesis inhibitor) and Lufox (mixture of jurenile hormone mimic and chitin sythesis inhibitor).The first international Conference of Biological Sciences 27-29-Sep. 2010 Cairo – Egypt. The testicular follicles of those males developed from treated one day old of the 5th nymphal instar with Consult (LC50) showed damage in zones of reduction and transformation and degeneration and necrosis appeared in many spermatids and spermatozoa. Those testicular follicles of males developed from treated 1 day old of the 5th nymphal instarr with Lufox LC50 showed severe degeneration and necrosis of the most spermatogenic stages.
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