1, vegetable seedling disease The main diseases of vegetables during seedling stage are blight and damping-off, which mainly endanger the seedlings of eggplant, pepper, tomato, cucumber and other eggplant vegetables. Control methods: (1) Seed treatment. Bacterial blight is controlled by dressing seed with 40% seed dressing. The amount of seed dressing used is 5 kg of seeds mixed with 10 g of the drug, must be mixed evenly, so that each seed is glued. (2) Strengthen seedbed management. The seedbed can be evenly sprayed with 40% formalin 100 times or 50% carbendazim or 50% thiophanate 100 times, then covered with membrane for 3 to 4 days, uncovered and cooled for 10 to 15 days to make soil After the Chinese medicine gas is sprayed, it is sown again. Greenhouse seedlings pay attention to the scientific release of air, prevent high temperature and humidity in seedbeds, cause leggy seedlings, and reduce disease resistance. (3) Chemical control. Once a disease occurs, it can be sprayed with 200-fold solution of 20% tolclofosf EC at the beginning of the disease, or sprayed with 72.2% Pro-cress 400 times solution, or 75% chlorothalonil wettable powder 600 times. , Or 50% carbendazim WP 600 times, spraying 2.5 kg per square meter of liquid. According to the disease, spray every 7 to 10 days, 2 or 3 times in a row. 2, Cruciferous downy mildew Cruciferous downy mildew can harm cabbage, Chinese cabbage, rapeseed, radish, cabbage, tomato, pepper and cucumber. Control methods: (1) Remove the diseased body in time. The diseased plants were found and timely brought out of the field and buried or burned. (2) Strengthen field management. Promote the cultivation of deep sorghum sorghum, appropriate dense planting, timely ditch drainage, reduce the humidity in the field, reduce the incidence. (3) Chemical control. At the beginning of the disease, use 40% EB aluminum WP 200 to 300 times or 64% WP WP 400 to 500 times, 1:0.5 : 300 times Bordeaux, 25% WP wet 800 ~ 1000 times liquid spray. With imported 70% Antai WP 500 to 700 times better. 3, cruciferous soft rot The main harm cabbage, followed by cabbage, radish, cauliflower, but also harm tomato, pepper. Control methods: (1) Remove the diseased body in time. Diseased plants were found, harvested or removed in time, and lime was sterilized after extraction. After the onset of not flood irrigation, string irrigation. (2) Strengthen field management. Deep sorghum cultivation is encouraged to facilitate drainage. Do small ground irrigation, avoid string irrigation and reduce the chance of germs spreading with water. (3) Chemical control. Before the onset or early stage, the diseased liquid and the surrounding healthy strains were timely sterilized with 0.25-0.5 kg per plant. The agent can be used as a suspension of 20% ray fungicide 500-600 times, 70% dexamethasone WP 500-1000 times, 47% garenone wettable powder 800-1000 times, 72% streptomycin Wettable powder 5000 times spray. 4, tomato early blight Early blight, also known as ringworm disease, can harm eggplant and pepper, in addition to harming tomatoes. Control methods: 75% chlorothalonil 500 times solution, 1:1:200-fold Bordeaux solution (1520 days before withdrawal), 80% WP WP 600 to 800 times, and 50% acetaminophen WP 1000 times Liquid, 43% Haldex suspension 3000 to 4000 times liquid, 25% Amistar suspension 1000 to 2000 times liquid spray. 5, tomato late blight The main damage tomato, pepper, eggplant. In the initial stage of the disease, the spray was sealed off at the onset center. Agents can be used 68% Jinlei water dispersible granules 600 to 800 times liquid, 72.2% Pleake water agent 600 to 700 times liquid, 70% phosporium aluminum manganese zinc wettable powder 500 times liquid, 64% anti-virus scorpion wettability Powder 500 times liquid, 72% Kelu wettable powder 600 to 800 times liquid spray. 6, Botrytis cinerea The main damage tomato, pepper, eggplant, cucumber, lettuce and so on. Control methods: (1) Remove the diseased body in time. After the harvest, the diseased body was promptly removed, brought out of the field to be buried or burned, and the soil was deeply turned to accelerate the decomposition of the diseased body. (2) Strengthen field management. Before the rainy season, do a good job of cleaning up the ditch around the protection site, drain the water after the rain and clear the ditch, and prevent the accumulation of water after the rain. (3) Chemical control. In the early flowering period or the beginning of onset of medication, every 7 to 10 days 1 time, 2 or 3 times in a row, severe disease field development as appropriate to increase the frequency of spraying. Agents can be used 50% fast-king WP 1500 ~ 2000 times, 50% acetaminophen WP 1000 ~ 1500 times, 43% HL suspension 3000 ~ 4000 times, 50% net wetability Powder 800 times, 40% 100% wettable powder 1000 to 1200 times spray. 7, vegetables, tobacco powder Vegetable Bemisia tabaci is mainly harmful to pepper, tomato, eggplant, cucumber and so on. Control methods: Greenhouse vegetables began in early March. When the number of adult insects began to rise, they were sprayed with pesticides and sprayed one or two times. It is also possible to use fumigation of vegetable safe fumigants at the height of adulthood. The agent can be used with 0.3% matrine 1000 times, 70% high red 3000 ~ 5000 times, 2.5% Letter 3000 ~ 5000 times, 10.8 Khan 1000 ~ 1500 times, 20% acetamiprid 1500 ~ 3000 times Liquid, 25% buprofezin (Cruciferous vegetables used with caution) 1000 times spray. 8, cabbage caterpillar The cabbage caterpillar is the main pest of leafy vegetables, and it mainly damages cabbage, broccoli, and rapeseed. Control methods: (1) Agricultural measures. Care should be taken to clean the garden in time, eradicate weeds, deepen the land, and eliminate overwintering. After the harvest, the stubble leaves should be promptly removed to reduce the base number of Pieris. (2) Cultivation of insect-free seedlings. Use insect nets to raise seedlings and prevent cabbage caterpillars from spawning on seedlings. (3) Chemical control. Drugs can choose 2.5% vegetable Xie Suicide 1000 times, or 5% Rui Jin Su suspension 2000 ~ 2500 times, or 5% stuck Ke EC 2000 ~ 2500 times, or 5% Sodium Cyanoacrylate 2000 ~ 2500 Double liquid spray. It is time to spray control during the height of the second-year instar larvae. 9. Plutella xylostella Plutella xylostella is a oligophagous pest that mainly affects cabbage, broccoli, radish, cabbage, etc., followed by green vegetables, Chinese cabbage and so on. Control methods: (1) Agricultural measures. After harvesting, vegetables should be promptly cleaned of dried leaves in the field, and the vegetable fields should be ploughed in time so as to reduce the food source of the first peak insect source and reduce the population density. Change the irrigation method to sprinkler irrigation. (2) Physical control. A frequency-type insecticidal lamp was installed in the mining area, and light was used to trap the adult insects. (3) Chemical control. Drugs can choose 2.5% vegetable Xie Suicide 1000 times, or 5% Rui Jin Su suspension 2000 ~ 2500 times, or 5% stuck Ke EC 2000 ~ 2500 times, or 5% Sodium Cyanoacrylate 2000 ~ 2500 Times of liquid, Bt500 ~ 1000 times liquid spray. It is time to spray control during the height of the second-year instar larvae. Advocate the use of a mixture of drugs and their use in rotation to delay or stop pest resistance.
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