Several key periods for vegetable disease control

Vegetable disease prevention must grasp the two key periods of seedling stage and flowering and fruiting stage, and follow the principle of "no disease prevention, disease treatment", its effect is ideal.

Seedling. This is a period when vegetable diseases are prone to occur, mainly fungus-induced bacterial wilt disease, cataplexy disease, and gray mold disease, and low temperature and excessive soil moisture caused by root disease. The specific operations are as follows:

1. The seeds should be disinfected to ensure that the seeds are free of germs. 2. The seedbed should be treated with disease-free new soil and treated with medicaments to prevent the seedbed from carrying bacteria. 3. Control seedbed watering to prevent diseases caused by excessive humidity in the seedbed. 4. In the summer seedling cultivation, pay attention to shade and cooling of the seedbed. 5. Strengthen seedbed management, cultivate strong seedlings, and improve disease resistance. 6. Remove the diseased seedlings in time and immediately take medicine to prevent them.

Flowering period. At this time, the disease is very easy to pandemic and has a great impact on the yield. It is a critical period for vegetable disease prevention *. The main cause of the disease is that the vegetables are transferred from vegetative growth to reproductive growth, which causes leaf nutrients and resistance substances to decline, and disease resistance is reduced, which creates favorable conditions for various bacterial infections. The prevention method is as follows:

1. Cultivate robust plants and improve plant disease resistance. 2. Strengthen field management, timely topdressing and foliar fertilization, improve plant nutrition, timely remove diseased old leaves, and strengthen field ventilation. Disease-free prevention and treatment. When there is no disease, you can spray mancozeb and other protective agents for prevention. If you find any disease, you should spray the treatment agent immediately to control. In general, for frequently occurring diseases such as blight and downy mildew, spray the medicine once every 7 to 10 days during the flowering and fruiting period, and then spray it 3 to 4 times to control.

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