Chitosan is a non-toxic and biodegradable organic polymer derived by simple chemical treatments from chitin, a major source of which is the leftover shells of crustacean seafood, such as shrimp, prawns, crabs, and lobsters. Production of chitosan from a different source is important, House flies are deposited about l00-l50 eggs by each female on appropriate food. they gave a lot of larvae of the housefly.
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