How to prevent the "three-phase" pests and diseases of Chinese cabbage

There are many pests and diseases in the seedling stage, rosette stage and core stage of Chinese cabbage. The main diseases are anthracnose, downy mildew, bacterial angular leaf spot, soft rot and spot disease; the main pests are aphids, jumpers and vegetables. Green worms, etc. To adopt an integrated prevention and control method, the key point is to prevent, strengthen the management of fertilizer and water, cultivate robust plants, and improve plant resistance; open drainage ditch around the ground to reduce the groundwater level so as not to induce a variety of diseases; timely cultivating and weeding, removing diseased plants and destroying them . On this basis, different prevention measures are adopted in different periods. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Seedling stage aphids can be sprayed with 50% smog-proof WP WP 2000-2500 times or 20% 蚜 1000 1000 1000 times, and prevent other pests; cabbage is an anthrax heavier field, should use 50% anthrax in time Wettable powder 500 times liquid spray; cabbage virus disease can be controlled by 20% virus A wettable powder 500 times liquid spray. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
The middle and late September of the rosette period is often the first peak period of downy mildew. It is necessary to strengthen the weeding and weeding, control the water, and properly seedling to improve the plant resistance. Downy mildew can be sprayed with 40% ethylphosphorus aluminum wettable powder 400 times solution or 64% antivirus WP WP 600 times solution or 75% chlorothalonil WP 600 times solution; black spot disease can be used 50% It is prevented by spraying 1000 times of wettable powder and preventing bacterial keratosis and black rot. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
After the cabbage season enters the core period, it is necessary to strengthen the management of fertilizer and water, timely drainage and irrigation, to ensure that the soil has enough water to prevent the soil surface from cracking, so as to avoid root damage. Eliminate the accumulation of water in the field after the rain, so as not to induce a variety of diseases. Timely topdressing, 8-10 kg of compound fertilizer per mu, to promote the growth of Chinese cabbage and improve its resistance. In the later period, it is necessary to stop topdressing, so as to avoid the growth of Chinese cabbage. According to the main types of pests and diseases, refer to the corresponding control methods to select the agent, and seize the favorable opportunity before the cabbage is closed to prevent and cure. The cabbage should be stopped for the first half of the harvest. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
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