Co-toxicity of Tea Saponin and Mancozeb against Colletotrichum capsici
HAO Wei-ning, CHEN Wen-tuan, HU Mei-ying*, LI Hui, YANG Liu, GENG Peng
Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China
Abstract：The co-toxicity and its synergistic ratios（SR）of tea saponin and mancozeb to Colletotrichum capsici was determined by using mycelium growth rate method, spore germination method and co-toxicity coefficient method. Meanwhile, the controlling effect in indoor pot experiment on colletotrichum capsici and its mixture was also tested. The results showed that the best mixed ratio of tea saponin and mancozeb to inhibit mycelium growth and spore germination of Colletotrichum capsici was 3∶7, and its SR were 2.45 and 2.48, respectively. The pot test results indicated that the controlling effect of the mixture at 3∶7 ratio was obviously superior than that of the individual treatment of the 2 fungicides.
