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.
维普
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