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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (19): 126-131.doi: 10.11924/j.issn.1000-6850.casb2025-0128

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Field Efficacy Evaluation of 7 Compound Fungicides Against Leaf Spot in Cherimoya

PAN Lianfu1(), LIN Shanyu1(), HUANG Kaihang2, LI Zhanbo3, LI Minglun4   

  1. 1 Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests/Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences/ Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Nanning 530007
    2 Agricultural Technology Service Station in Nalou Town, Yongning District, Nanning 530045
    3 Agricultural Technology Promotion Station in Fusui County, Chongzuo, Guangxi 532199
    4 Cane Research Institute of Guangxi Academy of Agricultural Sciences, Nanning 530007
  • Received:2025-02-24 Revised:2025-06-23 Online:2025-07-05 Published:2025-07-10

Abstract:

In order to screen out chemical fungicides to control cherimoya leaf spot, an evaluation of compound fungicides was conducted through field trials in the study. Seven compound fungicides widely used in agricultural production in China, which were 300 g/L difenoconazole·propiconazole suspension concentrate (SC), 275 g/L pydiflumetofen·propiconazole suspo-emulsion (SE), 325 g/L difenoconazole·azoxystrobin SC, 400 g/L mefentrifluconazole·pyraclostrobine SC, 42.4% pyraclostrobine· fluxapyroxad SC, 19% picoxystrobin·propiconazole micro-emulsion (ME) and 17% pyraclostrobine·epoxiconazole ME, were used in the test to confirm the control effects under field conditions. The survey result showed that 17% pyraclostrobine·epoxiconazole ME 170 mg/kg, 19% picoxystrobin·propiconazole ME 126.7 mg/kg, 42.4% pyraclostrobine·fluxapyroxad SC 226.1 mg/kg, 275 g/L pydiflumetofen·propiconazole SE 275 mg/kg had control effects of 83.20%-86.08% after third application, significantly higher than other treatments, as well as the yield increase percentages were higher than 16%. The four aforementioned fungicides were safety and had positive control effects and effectively reduce production losses caused by cherimoya leaf spot, thus it is recommended for consideration of use in production.

Key words: fungicides, cherimoya, leaf spot, field trial, control effect