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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (4): 874-879.DOI: 10.16409/j.cnki.2095-039x.2022.04.005

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Synergistic Effect of Zhongshengmycin and Natamycin on Tomato Gray Mold

JI Lindong1, MA Chao1, XU Jun1,2, ZHAO Yijun1,2, ZHANG Yanhui1, DUAN Xiaoli1, YANGYang1, CHEN Chang1,2   

  1. 1. Hebei Zhongbao Green Agricultural Crop Technology Co., Ltd, Beijing 100193, China;
    2. Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China
  • Received:2022-06-26 Published:2022-08-11

Abstract: In order to improve the control effect of existing bio-pesticides on tomato gray mold,the inhibitory activities of mixtures containing Zhongshengmycin and Natamycin on mycelial growth and conidial germination of Botrytis cinerea were investigated,and the synergistic effect and appropriate ratio of the two pesticides were determined.The mixtures of Zhongshengmycin and Natamycin showed synergistic effect on inhibition of hyphae growth when their weight ratios were at 9:1 and 1:1,with the synergistic coefficient of 3.6348 and 1.7145,respectively.Synergistic effect was also expressed in inhibition of the conidial germination when their weight ratios were at 9:1,7:3 and 1:1,with the synergistic coefficient of 1.7268,1.6335 and 1.5336,respectively.Field experiments showed that the 500 x dilution of 3% wettable compound powder of Zhongshengmycin and Natamycin (9:1) performed good effects on tomato gray mold on leaves and fruits,with the control efficacies of 81.04% and 78.48%,respectively,significantly higher than that of individual ingredient.The above results showed that the mixture of Zhongshengmycin and Natamycin in proper proportion could effectively improve the control effect on tomato gray mold.

Key words: Botrytis cinerea, Zhongshengmycin, Natamycin, synergistic effect

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