Disease Control Efficacy of Chitosan Preparations against Tomato Leaf Mold

Chang, Tae Hyun

Research in Plant Disease 2009;15(3):248-253.
Published online December 30, 2009.

토마토 잎곰팡이병에 대한 키토산 제제의 방제 효과

장태현

Disease Control Efficacy of Chitosan Preparations against Tomato Leaf Mold

Tae Hyun Chang

Abstract

Chitosan has an antifungal activity and is widely used for control of various plant disease and plants growth in the field in Korea. Disease control efficacy of two preparations (SH-1, SH-2) of mixtures of high and low (chitooligosaccharide) molecular weight chitosan compounds against tomato leaf mold caused by Fulvia fulva was investigated under plastic greenhouse conditions. Both SH-1 and SH-2 formulations displayed potent disease control activity in two experiments. The protective activity of both preparations was comparable to synthetic thiophanate-M. The persistence activity of the formulations was sustained until 21 days after application. Effective concentration of the chtosan compounds for disease control was 1,200 mg a.i./L. In pot tests, chitosan preparations, at a concentration of 600 mg a.i./L, promoted plants growth. These results indicate that the chitosan preparations have a potential as an eco-friendly natural fungicide for the control of tomato leaf mold and plant growth regulator.

Key Words: Chitosan compounds, Eco-friendly natural fungicide, Plant growth regulator, Tomato Leaf mold (Fulvia fulva)