Evaluation of Field Control Efficacy of Several Fungicides Against Apple Powdery Mildew in Nyingchi
- Received Date: 16/02/2022
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Key words:
- apple powdery mildew /
- fungicides /
- control efficacy /
- Nyingchi
Abstract: In order to effectively control the apple powdery mildew, the effective fungicides suitable for local production were screened. In this study, the field control efficacy test of ten kinds of fungicides against powdery mildew of apple was carried out in the orchard of Mirui township, Bayi District, Nyingchi City. The results showed that the best control effect was achieved by 40% mycloxazole WP with more than 80% of control effect at 14 d after the third application. The 50% sulfur JG, 30% hexazole ethyl phenol ME, 300 g/L etherithoxylateridyl SC and 80% sulfur WG also achieved more than 70% of control efficacy at 14 days after the third application. Therefore, the above five agents can be used as the first choice for the control of powdery mildew, and can be used alternately in the orchard. The results provide theoretical basis for the effective prevention and control of the disease.
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