Ｎ‐アシルアミノ酸エステルの植物病原菌生育阻害作用

Abstract

Nα-cocoyl-L-arginine ethyl ester DL-2-pyrrolidone-5-carboxylic acid salts (abbreviation: CAE) was prepared by neutralization with pyrrolidone carboxylic acid after condensing fatty acids of coconut oil and L-arginine ethyl ester. Tests for protection of plant pathogens were performed because of wide antimicrobial action of CAE. As the results of investigation in laboratory, CAE in the medium had shown remarkable antimicrobial effects to anthracnose of banana, rust of broad bean, sheath blight of rice plant, black spot of pear respectively. Field tests were carried out and growth inhibitory actions to plant pathogens were clearly shown at such concentration as 500 μg/ml to chocolate or red spot of broad bean, 70 μg/ml to black spot of pear and scab of pear, 150 μg/ml to rust of pear, and 500 μg/ml to bacterial leaf spot of cucumber and downy mildew of cucumber. A slightly inhibitory action to powdery mildew of cucumber was also found.