Screening of Microbial and Chemical Fungicides and Evaluation of Their Combined Application with Seed Coating Agents for Controlling Sesame Fusarium Wilt

doi:10.16409/j.cnki.2095-039x.2025.02.072

Abstract

Abstract: Fusarium wilt is one of the most common and serious diseases in sesame. This study aimed to screen efficient commercial microbial agents and fungicides for controlling sesame Fusarium wilt. It also aimed to clarify the synergistic effect of microbial agents, fungicides and seed coating agents. Inhibitory effect of fungicides on F. oxysporum was determined by hyphal growth rate method. Control effect of microbial agents, fungicides, and their synergistic use with seed coating agents was determined by pot experiment. Three microbial agents with a control efficacy above 50% at the sesame flowering stage were screened. Among them, the representative strains Tulaoban^® Trichoderma harzianum powder and Yiqiang Bio^® Bacillus subtilis powder showed control efficacies of 58.38% and 31.60%, respectively, in the capsule stage. Three highly effective and low-toxicity fungicides were screened, including: 30% myclobutanil·ethirimol suspension, 30% pyraclostrobin suspension, and 40% difenoconazole suspension, with the control efficiencies of 67.39%, 45.66%, and 45.66%, respectively. Five groups of microbial agents, fungicides, and seed coating agents with a control efficacy above 70% were screened. The treatment group Yiqiang Bio^® B. subtilis powder + 15% carbendazim·thiram suspension seed coating agent + 30% pyraclostrobin suspension had the best control efficacy 89.65%. This study screened effective microbial agents and low-toxicity fungicides for controlling sesame Fusarium wilt and also provided a synergistic control strategy combining microbial agents, fungicides and seed coating agents for the whole sesame growth period.

Key words: sesame, Fusarium wilt disease, microbial agent, fungicide, control efficacy

CLC Number:

S476

ZHAO Xinbei, NI Yunxia, LIU Xintao, ZHAO Hui, WANG Jing, HE Bipo, ZHANG Chunyan, YAN Wenqing, LI Yongdong, LIU Hongyan. Screening of Microbial and Chemical Fungicides and Evaluation of Their Combined Application with Seed Coating Agents for Controlling Sesame Fusarium Wilt[J]. Chinese Journal of Biological Control, 2025, 41(6): 1379-1389.

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