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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (28): 143-147.doi: 10.11924/j.issn.1000-6850.casb2024-0025

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Control Effect of Isopyrazam·Tebuconazole 40% SC on Controlling Citrus Melanose

LIN Jieying(), HUANG Feng, CUI Yiping, LING Jinfeng, GUO Bin, SONG Xiaobing()   

  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:2024-01-11 Revised:2024-08-02 Online:2024-10-05 Published:2024-09-29

Abstract:

The study aims to screen the safe and efficient fungicide for controlling citrus melanose, clarify the control effect and the appropriate dosage of the new compound isopyrazam·tebuconazole 40% SC on citrus melanose. Field efficacy tests of the new compound isopyrazam·tebuconazole 40% SC for controlling citrus melanose were carried out for two consecutive years from 2021 to 2022. The results of the two years experiments showed that isopyrazam·tebuconazole 40% SC 200 mg/kg had a good control effect on citrus melanose. After three times of application in 2021, the control effect of isopyrazam·tebuconazole 40% SC 200 mg/kg on citrus leaves citrus melanose and fruits citrus melanose were 79.60% and 77.97%, respectively. After three times of application in 2022, the control effect of isopyrazam·tebuconazole 40% SC 200 mg/kg on citrus leaves citrus melanose and fruits citrus melanose were 81.65% and 76.37%, respectively, which were significantly better than 20% isopyrazam wettable powder and 430 g/L tebuconazole suspension. The isopyrazam·tebuconazole 40% SC is safe and efficient for the prevention and treatment of citrus, which is worthy of application in the demonstration and promotion of citrus melanose control.

Key words: isopyrazam, tebuconazole, citrus melanose, fungicide control, effect evaluation