The incidence of diseases and insect pests in cabbage seedlings, rosettes, and balsamics was more. The main diseases were anthracnose, downy mildew, bacterial keratoses, soft rot and spotting; the pests were mainly locusts, fleas, and vegetables. Greenworm and so on. To adopt a comprehensive prevention and control approach, the key is to do a good job of prevention, strengthen management of fertilizers, cultivate robust plants, and improve plant resistance; open drainage ditch around and lower groundwater level to avoid inducing multiple diseases; timely cultivating and weeding, disease removal, and destruction . On this basis, different prevention and control measures were adopted in different periods. In the seedling stage, the aphid can be sprayed with 50% evasion mist 2000-2500 times or 20% locust 1000 times, and prevent other pests; the cabbage field with heavy anthracnose should use 50% anthrax in time. Wettable powder 500 times liquid or 2% agricultural anti-120 liquid agent spray; cabbage virus disease can be used 20% virus A wettable powder 500 times spray control. Rosette period is often the first peak of downy mildew in the middle and late September. It is necessary to strengthen the cultivating and weed control, control the water, and appropriate seedlings to increase plant resistance. Downy mildew can be treated with 40% EDEP WP 400 times or 64% WP WP 600 times or 75% WP WP 600 times; black spot can be used 40% asparagus blue Wettable powder 500 times or 50% acetaminophen wettable powder 1000 times spray control, and prevent bacterial angular and black rot. During the period of the insulatability of Chinese cabbage during the period of Baoxin period, it is necessary to strengthen the manure management, timely drainage and irrigation, ensure that the soil has enough water, and prevent the surface from cracking, so as not to damage the roots. After the rain, remove the stagnant water in time so as not to induce a variety of diseases. Timely topdressing, Mushi compound fertilizer 8-10 kg, potassium 8 kg, in order to promote the growth of Chinese cabbage and increase its resistance. In the later period, it is necessary to stop top dressing so as not to make the cabbage grow long. According to the types of diseases and pests in the mainstream, the pharmaceuticals should be selected with reference to the corresponding control methods to take advantage of the favorable timing before ridging cabbage. The herbs should be stopped before the harvest for half a month.
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