The critical period of prevention and cure of vegetable diseases
This is the period when vegetable diseases are most likely to occur, and it is also the critical period for prevention and control. The diseases that are harmful to the seedling stage include epidemic diseases caused by fungal infection, botrytis, blight and stem rot. There are also root diseases that occur due to high soil moisture. Prevention and treatment of seedling diseases must be done in the following aspects: seeds must be disinfected prior to sowing to prevent seed contamination; soil seedlings should be disinfected to eliminate soil-borne pathogens; watering of the seedbeds should be controlled to prevent disease occurrence due to excessive moisture in seedbeds; When raising seedlings, pay attention to temperature, prevent cold (frozen) damage and invasion; scientific management of seedbed, cultivation of strong seedlings, improve resistance; find diseased seedlings timely removal, symptomatic prevention and treatment.
The first flowering period and fruit enlargement period are the second prone period for vegetable diseases. At this time, it is a volcanic day and a rainy season. The humidity in the field is large, and the disease easily occurs. It has a great impact on the yield and is the key to the prevention and control of vegetable diseases. Period of time. The cause of the disease is the transfer of vegetables from vegetative growth to reproductive growth, resulting in a decrease in nutrients and resistant substances in the leaves, creating favorable conditions for the invasion of bacteria. At the same time, the closed plants in the field, poor ventilation and light transmission, and rain after rain are all conducive to disease. For the prevention and treatment of diseases at the early flowering stage and fruit enlargement stage, the following work should be done: cultivate robust plants, enhance stress resistance, promote high-riding cultivation patterns; do a good job in field management, scientifically apply biological fertilizers and high-quality foliar fertilizers, and activate plant immune systems. , to improve disease resistance and yield; to prevent disease-based, supplemented by treatment, prevention and control of the principle, in the absence of disease can be used 25% Amisida Suspension and other protection for prevention, for the disease, downy mildew, anthrax Diseases, such as diseases, are usually sprayed once every 7 to 10 days, and the disease can be controlled by spraying 3 to 4 times.
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