After fruit bagging, take 50 kilograms of biogas slurry, place it in the filter for 2-3 days, spray it directly, and spray it 2-3 times, once every 10 days. The precautions are as follows:
1. Biogas from the digester discharge room that normally produces gas for more than 3 months must be used.
2. It must be done on a sunny or cloudy day without wind. It is better to spray the leaves on the back after 4 o'clock in the morning or better.
3. The addition of 1/3000-1/10000 of swamp strips and insect-killing eggs is more effective in the biogas slurry, and the duration of efficacy is more than 20 days.
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