Chitin is the main component of fungi cell wall, septum and insect exoskeleton. Chitinase plays a very important role in the life-form containing chitin. Insect ecdysis and separation of fungal mother and daughter cell need chitinase for partially degradating chitin. Chitinase can be the target of potential novel bio-pesticides and antifungal agents. Chitinase inhibitor can prevent insect larve and pupa ecdysis and fungal cell separation through inhibiting chitinase activity. The relative research of chitin...