Pollution-free Watermelon Pest Control Technology
Watermelon diseases and pests mainly include damping-off, anthracnose, blight, blight, virus diseases, and flies, leafhoppers, melons, and L. sativae. I. Agricultural control 1. Clean the pastoral. The first is to clear the roadside weeds near the melon field and reduce the number of hosts that can be used in the early stages of pests; second, the host range of the watermelon mosaic virus is wider, and the harmful insects can harm the weeds and then enter the fields with melons, removing weeds near the fields. It has an important role in preventing pests; the third is to remove the diseased watermelon strains. The diseased plants should be removed and buried deeply or burned. Do not dispose of them in the ditch or on the roadside. 2. Foliage top dressing. The melon farmer generally pays much attention to the application of basal fertilizer, and solid foliar dressing is also an integral part of fertilizer application. The use of 0.2% potassium dihydrogen phosphate in combination with sprayed pesticides when mixed together, the strong growth of the plants, plus disease resistance has a significant effect, in addition to watermelon after fruit set, a large amount of nutrients required, can be combined with the application of pesticides each mixed 0.3 % Potassium dihydrogen phosphate applied to foliar fertilization, but enhanced plant growth and resistance, and phosphorus and potassium fertilizers promoted early ripening of watermelons and increased sugar content, high watermelon quality, weak plant growth, can increase by 0.2% to 0.3% Urea mixed spraying. Foliar fertilization of the diseased watermelon plants slows down the disease. Second, biological measures 1. Use biological pesticides 2% nannanmycin 200-250 times, spray control before or at the onset of viral disease. 2. Control the aphids with 0.9% insecticide 3000 times spray. Third, chemical control 1. Watermelon occurs after the emergence of damping-off, spraying 66.5% Propolis water 1000 ~ 1500 times, 64% anti-virus glutinous rice 8 wettable powder 400 ~ 500 times liquid, anti-virus 200 times dry fine soil soil spread in the seedlings The basal part reduces the incidence of vine blight. 2. Control fusarium wilt, use 50% carbendazim wettable powder 2 kg when planting, 100 kg fine soil, apply to planting holes, also use 50% carbendazim WP 500 times, or 70% thiol The 1000 times 1000 times the root fluid perfusion, 250 ml per point of liquid medicine, also prevent the occurrence of anthrax. In the early stage of wilt disease, after the occurrence of the wilt disease strain, a circular pit with a depth of 8 to 10 cm and a radius of 10 cm was dug around the rhizosphere of the diseased plant, so that the main root part was exposed, and 50% carbendazim WP 500 was used. Times of liquid or 70% thiophanate-methyl 1000 times Irrigation root, 500 ml per point of liquid, can cure blight. 3. The main land where bacterial blight occurs can be sprayed with 70% thiophanate-methyl 800 times, or 64% antivirus glutinous rice 8 WP 500 times. 4. Prevention of viral diseases. Virus disease is mainly transmitted by locusts and should be controlled by locusts. Before locust occurrence peaks, it can be sprayed with 20% imidacloprid for 1500 times. The fumigation method can be used for the protection of land, with 1.5 percent zigram smoke agent 300 grams per 667 square meters, more uniform distribution in the shed, closed the greenhouse in the evening, followed by light. 12 hours after the closing of the shed; release of air; 80% dichlorvos 667 square meters can also be used with 150 to 200 grams of fumigation, evenly distributed in the greenhouse, each pile of sawdust first piled, lit after dipping in dichlorvos ignited, this method is generally around noon during the day When the temperature in the booth reaches about 30°C, it is ventilated after 2 hours of smoking. The virus plants were found to be able to spray 20% virus A600 times and spray once every 7 days for 2 or 3 consecutive times. 5. At the early stage of anthrax attack, spray 80% of anthrax 800 times, or 70% thiophanate-methyl WP 500 times, or 50% WP WP 400-600 times. Smoke can be used to protect the fumigation method, with 45% chlorothalonil smoke agent every 667 square meters each time 200 to 250 grams, 8 to 10 days smoked once, and can also treat the disease. 6. Leaf fly. The larvae eat leaves in the leaves, and form many curved stalks in the leaves, grasp the adult's occurrence in time to control the adults, or spray and control the larvae when the larvae appear. It can be sprayed with 40% Green Vegetable Po 800x, or 25% Likas 1000x, or 40% Dimethoate 1000x. 7. Sterilization, pesticides and fertilizers are used together. The fungicides, insecticides, and potassium dihydrogen phosphate used as foliar fertilizers cannot be mixed with anti-virus crickets. Other bactericides and insecticides can be mixed and applied. General pesticides can be kept for about 7 days in sunny days, so pesticides should be sprayed once every 7 days. This can prevent pests and diseases and promote robust growth of watermelon plants.
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