Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (2): 78-86.doi: 10.11924/j.issn.1000-6850.casb2021-0458

Special Issue: 生物技术 植物保护

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Fungicide Screening and Control of Stem Blight of Eleocharis dulcis

LAI Xiaofang1(), YU Shanhong1(), YANG Changliang2, LI Lin3, CHENG Xu2, CHEN Xiaoshang1   

  1. 1Taizhou Academy of Agricultural Sciences, Linhai, Zhejiang 317000
    2Taizhou Bureau of Agriculture and Rural Affairs, Taizhou, Zhejiang 318002
    3Zhejiang Agricultural and Rural Big Data Development Center, Hangzhou 310020
  • Received:2021-04-30 Revised:2021-08-24 Online:2022-01-15 Published:2022-02-25
  • Contact: YU Shanhong E-mail:lxf19633@163.com;277298512@qq.com

Abstract:

To screen and evaluate the efficacy of different fungicides, the susceptibility of 41 fungicides to Cylindrosporium eleocharidis was measured by mycelium growth rate method. The results indicated that 18 fungicides had good antibacterial effect, among them, 250 g/L propiconazole EC had the best efficacy of 100%, followed by 43% fluopyram-trifloxystrobin SC, 560 g/L azoxystrobin-chlorothalonil SC and 250 g/L azoxystrobin SC, which had the efficacy of 99.1%, 98.3% and 95.1%, respectively. Field efficacy test showed that 560 g/L azoxystrobin-chlorothalonil SC and 250 g/L azoxystrobin SC had the best control effect on stem blight of Eleocharis dulcis, both above 74.0%, and the yield was less affected. 10% difenoconazole water dispersible granule and 43% fluopyram-trifloxystrobin SC had a control effect above 66.0%, but had certain influence on the yield. As to the incidence rate, that of CK was the most serious, with an incidence rate of 94.2% and a disease index of 96.14, causing serious effect on yield and quality.

Key words: Eleocharis dulcis, stem blight, fungicide screening, control effect, incidence rate, yield

CLC Number: