In summer, the temperature will increase further, and the damage from vegetable pests will be even more serious. This will create conditions for the transmission of poisonous pests and virus diseases. At the same time, with the arrival of the high temperature and rainy season, the rainfall will increase, which is the season when the open vegetables grow faster, and it is also the time when the autumn vegetable nursery is about to begin. Therefore, the prevention of summer vegetable virus disease is of great significance to ensure the production of vegetables and the harvest.
Viral diseases can occur on all kinds of vegetables, especially on exposed vegetables. There are many symptoms on the symptoms, common symptoms include leaf mosaic, streak, shrinkage, fruit deformity, dwarfing, clustering, etc., the field is generally easier to identify. However, if the symptoms are shown after the onset of symptoms, the general effect is poor. To this end, we must do a comprehensive prevention and control of vegetable virus disease.
First, seed treatment. Seed borne bacteria are an important source of crop virus disease, such as seed borne bacteria, the crop will be affected at the seedling stage and have a great impact on the yield. Therefore, attention should be paid to seed treatment before sowing. It can be soaked with 10% trisodium phosphate solution or 1% potassium permanganate solution for 15-20 minutes before sowing, to passivate the germ vitality on the seeds.
Second, seedling management. Strengthening the management of vegetable seedlings is the key to preventing viral diseases. The first is to pay attention to pest control measures to reduce pest transmission opportunities. The second is to adopt shading measures as appropriate, such as shading nets, etc. to shade, in order to avoid high temperature on the seedbed.
Third, chemical control In the initial stage of the incidence of vegetable virus disease, spraying anti-virus agents, you can choose virus A, virus, etc. to control the water spray. Adult vegetables should enhance fertilizer and water management, and cultivate strong plants to improve plant resistance to stress and disease resistance.
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