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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (31): 147-151.doi: 10.11924/j.issn.1000-6850.casb2022-0921

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Control Effect of 5 New Compound Fungicides on Pitaya Canker

SONG Xiaobing(), CUI Yiping, CHEN Xia, PENG Aitian, LING Jinfeng, HUANG Feng   

  1. Institute of Plant Protection, Guangdong Academy of Agricultural Sciences/Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640
  • Received:2022-11-14 Revised:2023-06-14 Online:2023-10-31 Published:2023-10-31

Abstract:

The compound fungicides with better control effect on pitaya canker were screened to provide the basis for scientific prevention and control of the disease. The inhibitory effect of five new compound agents on pitaya canker was determined by the mycelial rate growth method, and the field control effect test was carried out. The results of indoor toxicity test showed that fluorobacteria·tebuconazole 400 g/L SC, benzodiazepine·azoxystrobin 325 g/L SC and trifloxystrobin·tebuconazole 75% WDS had strong inhibition on Neoscytalidium dimidiatum. When the concentration of the medicine was 10 μg/mL, the inhibitory effect of the three fungicides on pathogenic bacteria ranged from 92.57% to 97.21%. The results of the field efficacy test showed that the above three fungicides had good control effects on pitaya canker in the field, and the average control effect was between 71.12%-77.45% after 12 days of three treatments. The three fungicides of fluorobacteria·tebuconazole 400 g/L SC, benzodiazepine·azoxystrobin 325 g/L SC and trifloxystrobin·tebuconazole 75% WDS are safe and efficient for pitaya, and are worthy of application in the prevention and treatment of pitaya canker.

Key words: canker disease, pitaya, fungicides screening, toxicity determination, field efficacy