ABSTRACT
Although chitin was isolated by Braconnot in 1811 for the rst time from the cell walls of mushrooms, and chitosan was found in 1894 by Hoppe-Seyler, they remained unused biological resources for more than 100 years. However, interest in these abundant carbohydrates increased rapidly from the 1960s. The enormous increase in the number of relevant research papers and patents revealed a surprisingly high level of chitin/chitosan research activity from both academic and industrial scientists. Many literatures reported that CTS (chitin/chitosan and their derivatives) have antimicrobial and plant-defense elicit function (Albersheim and Darvill 1985); therefore, CTS are considered useful pesticides in the control of plant disease.
