Rotations and other vegetable varieties are carried out for 2 to 3 years of rotation.
Select disease-free seeds and treat the seeds. The disease-free plot was selected for seeding. The newly purchased seeds were soaked in warm water at 50°C for 25 minutes, and sown after cooling. Before sowing, seed dressing was sterilized according to the proportion of 100 kg seeds 300 g 35% metalaxyl; at the beginning of the disease, 72.2% Preclosures were sprayed at 8000 times, 7 days to 10 days to control 1 time.
Tian Guan has chosen a land with high topography, good drainage, and ventilation. Apply fertilizer and increase phosphorus and potassium fertilizers. Reasonable irrigation, do not make the land too wet. Discover the diseased plants and remove them in time. After the harvest, the diseased bodies were completely removed, concentrated treatment, and deep plowing were performed to reduce the source of bacteria.
Control of early onset of spraying control, spray once every 7 to 10 days, and even spray 3 to 4 times, the commonly used agents are 1:1: 240 ~ 300 Bordeaux mixture, 40% aluminum phosphate aluminum wettable powder 200 ~ 300 Times.
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