Seedling period. This is the period when vegetable diseases are most likely to occur. The main causes are bacterial blight, damping-off, and gray mold, as well as root disease caused by low temperatures and excessive soil moisture. The specific operations are as follows: 1 The seeds should be disinfected to ensure that the seeds are free of germs. 2 Seedbeds should be treated with new disease-free soil and treated with pesticides to prevent the seedbed from carrying bacteria. 3 Control the watering of the seedbed to prevent the seedbed from causing diseases due to excessive humidity. 4 Summer nursery should pay attention to shade and cooling of seedbeds. 5 Strengthen seedbed management, nurture strong seedlings, and improve disease resistance. 6 When the diseased seedlings were found, they were promptly removed and immediately treated with medication. Flowering result period. At this time, the disease is extremely prone to pandemic and has a great impact on the yield. It is the most critical period for the prevention and control of vegetable diseases. The main cause of the disease is the transfer of vegetables from vegetative growth to reproductive growth, which results in the decline of leaf nutrients and resistant substances, and the reduction of disease resistance, which creates favorable conditions for the infection of various pathogens. Its prevention and control methods are as follows: 1 To cultivate robust plants and improve plant disease resistance. 2 Strengthen field management, timely top-dressing and foliar fertilizer, improve plant nutrition, remove old leaves in time, and strengthen ventilation and light in the fields. Disease-free prevention, disease treatment. In the absence of disease, protection agents such as Mn-Zn may be sprayed for prevention. If the disease is found, therapeutic agents should be sprayed immediately for control. In general, for diseases such as epidemics, downy mildew, etc., a single drug should be sprayed for 7 to 10 days during the fruiting period and can be controlled by spraying 3 to 4 times. Corrugated Pipe Machine,pvc corrugated pipe machine,single wall corrugated pipe machine,Double Wall Corrugated Pipe Machine zhangjiagang sevenstars machinery co.,ltd , https://www.sevenstarmachienry.com
Prevention and cure of vegetable diseases should be a critical period
The prevention of vegetable diseases basically takes the following two critical periods and follows the principle of “disease-free prevention, disease prevention and treatment,†and its effect is relatively satisfactory.
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