In spring, the temperature is high, the number of rain is low, and the number of hours of sunshine is high. As the temperature rises and the humidity increases, the incidence of various diseases and insect pests in vegetables is on the rise. Such as melons, downy mildew, powdery mildew, melons, beans, wilt disease, fruit and vegetable diseases, M. blight, gray mold, tomato bacterial wilt; various underground pests, aphids, leaf miners, cabbage caterpillars, Plutella xylostella, flea beetle, cotyledon, etc. (The symptoms or morphologies of some of the pests are shown below). All localities are doing a good job in fertilizer and water management, greenhouse ventilation, light transmission, and dehumidification work to timely dispose of crop pests and diseases, and concentrate on deep-buried manure or burn, and use high-efficiency, low-toxicity, low-residue pollution-free pesticides for vegetable pests and diseases. Harmless governance. 1. Fusarium wilt: At the early stage of disease, we can use the following medicines to sterilize: (1) 95% of Green Hengheng No. 1 (4000 times); (2) 40% of anti-fukuning (800 to 1000 times) dilution; (3) 77% of WP to kill 600 -800 times dilution. Roots once every 5 to 7 days, even 3 to 4 times. At the same time, diseased strains were removed in time and destroyed. 2. Bacterial wilt: Clear the soil around the diseased plants and roots and disinfect the lime. And agricultural streptomycin per 10 million units watered 50 kg, or 20% thiazole copper suspension 600 times liquid or 20% of the crown undiluted powder 1200 times the roots Jian Jian, each strain 0.5 kg. 3, epidemic, Mianbing disease: 72% DuPont Kelu 600-800 times or 58% metalaxyl MnZn wettable powder can be used to control. 4, downy mildew: can be used 72% DuPont Kelu 600 to 800 times, or 64% anti-virus WP 500 times, or 50% Anke 2000 times control. 5. Virus disease: Based on prevention and control of aphids, use 20% Kangrun (virgin virus grass a) wettable powder 800 times liquid to prevent and treat. 6, gray mold: to prevent the main, in the early flowering stage until the end of the flower can be used 40% pyrimethanil 1000 to 1500 times, or 50% gray mold star 1000 times, or 65% more moldy spirit 1000 times evenly spray. 7. Small earthworms, earthworms, cockroaches and
Other underground pests: 50% Phoxim EC 500 ml diluted with 0.5 liters of water, mixed with 20 kg of fine dry soil or 3% of land with granules , Mix with 10kg of fine dry soil and mix well into poisonous soil, make the bottom of the seedling bed or evenly spread around the transplanted plants. Can also be used 50% phoxim EC or chlorpyrifos 800 to 1000 times liquid rooting. When spraying chemicals or toxic soil to avoid contact with plants, soybeans, cucumber fields with caution, so as not to produce phytotoxicity. 8. Aphids: Aphids are the main vectors of viral disease. Prevention and control of aphids can greatly reduce the occurrence of viral diseases. Can choose to use 1.8% insect fleas (avermectin) 2500 times, or 20% of good year winter 2000 ~ 3000 times solution, or 10% lanthanum powder 2000 times solution. 9, yellow song strips, beetles: can use 40% chlorpyrifos 800 to 1000 times, or 5% Ruijin special suspension 2500 times; or 90% trichlorfon crystal 1000 times and other prevention and treatment. 10. Liriomyza huidobrensis and other leaf miners: For the severely damaged seedlings, they must be completely removed to reduce the population of insect populations; general surveys should be carried out on the damage conditions, and chemical control should be carried out at the initial stages of the pests to prevent proliferation. Drug control: When the pest damage rate reaches 5 to 10%, choose 1.8% of worms (avermectin) 3000 times; or 1000 times of dichlorvos; or 40% of chlorpyrifos 800 to 1000 times spray. 11. Pieris rapae, Plutella xylostella: In the youngest larvae at the youngest age, when the number of larvae per plant exceeds 3 to 5, 5% chlorate 2,000 times; or 1.8% larvae 3000 times, or 5% fulgenous suspension. 2500 times or 15% DuPont hits suspension agent 4000 times spray control. Prevention and treatment of disease every 10 to 15 days once (a serious condition when about 7 days), continuous control of 2 or 3 times, the drug should be used interchangeably. The foliar spray should be fine when spraying, and the amount of water should be enough. The front and back of the blade should be sprayed.
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