Journal of Zhejiang Agricultural Sciences ›› 2024, Vol. 65 ›› Issue (3): 647-651.DOI: 10.16178/j.issn.0528-9017.20230380

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Screening of indoor pesticides and evaluation of field control effectiveness for stem rot disease of Dioscorea esculenta

CHAI Rongyao1(), YOU Yuxin1,2, QIU Haiping1, NI Jianping3, GUO Junning2, ZHANG Zhen1, LI Bin2, SHEN Shengfa4, WANG Yanli1,*()   

  1. 1. Institute of Plant Protection and Microbiology,Zhejiang Academy of Agricultural Sciences,State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Provincial National Crop Variety Resistance Identification Test Station, Hangzhou 310021, Zhejiang
    2. College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang
    3. Regional Development and Governance Center of Yinhu Sub district Office in Fuyang District, Hangzhou City, Hangzhou 311402, Zhejiang
    4. Institute of Crop and Nuclear Technology Utilization Research, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang
  • Received:2023-04-06 Online:2024-03-11 Published:2024-04-08

Abstract:

In order to provide new ways for the prevention and control of stem rot disease in Dioscorea esculenta, this article conducts drug screening through indoor toxicity testing and field experiments to screen effective prevention and control drugs for stem rot disease of Dioscorea esculenta. Using the minimum inhibitory concentration method in the toxic medium method, the indoor toxicity of 19 pesticides was determined, and based on this, 6 pesticides with better control effects were selected for field control experiments. The results showed that bromonitrol had the strongest antibacterial effect in indoor toxicity testing, with a minimum effective concentration of 4.69 mg· L-1, followed by thiamethoxazole, mesobiotin, amphotericin (kasumin), oxytetracycline, streptomycin sulfate, and amphotericin·thiazole zinc. The minimum effective concentrations of inhibition were 7.50, 18.25, 28.13, 37.50, 75.00 and 150.00 mg· L-1, respectively. Among the six selected pesticides in the field experiment, amphotericin·thiazole zinc had the best control effect, with a control effect of 82.16%, followed by thiamethoxazole, mesobiotin, bromonitrol, and amphotericin·zhongshengmycin, with a control effect of 79.55%, 77.18%, 76.56%, and 75.02%, respectively. They can all be used as effective control agents for stem rot disease of Dioscorea esculenta in the field.

Key words: Dioscorea esculenta, stem rot disease, prevention and control, pesticide screening, field efficacy

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