How to prevent apple brown spot disease in the rainy season
Stepping into July, there were varying degrees of persistent rainy and hot weather in various places, which provided conditions for the occurrence of apple pests and diseases. In particular, the prevention and control of leaf diseases such as apple brown spot disease has reached a critical period.
Solution 1. Strengthen cultivation management, enhance tree potential, and improve tree disease resistance. Orchards with high soil weight or high groundwater level should pay attention to drainage and prevent internal sputum. Reasonable trimming, so that the crown can be ventilated and lightened to reduce the occurrence of diseases.
2. After the apple bagging has not been used to fight the orchard, it is necessary to take time to fight the drugs. In principle, the interval between two beatings after bagging should not exceed 10~15 days.
3. The principle of fighting drugs after bagging. After bagging, you should master the systemic (treatment) + protection sequence and use it alternately. Change the old habit of previous protection + systemic (treatment).
After apple bagging, the rainy weather is frequent. Although many apple orchards have not occurred in apple orchard, the brown spot pathogen has been infected to varying degrees. Therefore, it is necessary to use a therapeutic fungicide.
The choice of agents for the prevention and treatment of brown spot disease should be based on azoles, such as Xize (50% methotrexate SC) or Domi Miao Cai (12.5% ​​flucyclazole SC) or novel (12.5% ​​tebuconazole EW) The effect is very good, especially the serious orchard can add Trier (46% anti-manganese zinc WP), the treatment is rapid and thorough. The prevention and treatment of brown spot disease should have a good interval between medications. If the interval between medications is too long and then rain, then the medicine is good, and the effect is not good.
Special emphasis on the occurrence of continuous rainfall, whether or not the drug has been taken before the rain, must stop the rain after the rain, promptly make up the pesticide, and mainly use therapeutic pesticides to prevent the occurrence of leaf diseases such as brown spot disease. . Yu Pengjun, Marketing Department, Heilier Pharmaceutical Group Co., Ltd.
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