Core tips
Based on the occurrence rule of greenhouse pests and diseases, combined with various measures in the cultivation process of zucchini, prevention and control are mainly based on agricultural control and physical control, and chemical prevention and control are supplemented with prevention and control.
1. Before transplanting the plants with a drug, 3-4 days before planting, each barrel (15 kg) is sprayed with 68% Jinlei water dispersible granules 600 times and 25% Aquecys water dispersible granules 1500 times. Leaking to be planted. Prevent whitefly, virus disease, Phytophthora root rot effect is good, the effective period of up to 30 days.
2. The use of high-quality shed film for agricultural control can not only reduce the humidity, but also increase the heat preservation and light harvesting; scientific fertilization and application of organic fertilizer. In the sunny days of 9-11, carbon dioxide gas fertilizer can be used to increase photosynthesis. The most common method currently used is the reaction of ammonium bicarbonate with sulfuric acid to produce carbon dioxide. The amount of ammonium bicarbonate used is 3-5 grams per square meter in the deep winter season, and 5-7 grams per square meter after mid-to-late February, so that the concentration of indoor carbon dioxide reaches about 1000 milligrams per kilogram; the cultivation of sorghum uses the sub-film irrigation technology. , Or spread wheat straw, wheat bran, reduce air humidity, deterioration of disease conditions; melon phase combined with spraying with 0.2% potassium dihydrogen phosphate, 6% chitin 500 times, 0.5% urea plus the same amount of brown sugar, increase nutrition, Improve crop resistance to disease.
3. Temperature and Humidity Management Warm up to 28-32°C in the morning as soon as possible, but the maximum is not more than 35°C, the relative humidity of air is 60%-70%; In the afternoon, the temperature is reduced to 20°C-25°C, the relative humidity of air is about 60%; The relative humidity reached 85%, the temperature dropped to 15°C-20°C, the humidity was over 85% in the middle of the night and the temperature dropped to 10°C-13°C.
4. Physical control Insect nets are installed in the vents to prevent pests from invading. Place yellow plates in the greenhouse to hang yellow sticky strips in the air vents, trap and kill whitefly, aphids, and Liriomyza sativae. Cover them with silver-gray or silver shade nets to avoid aphids and thrips.
5. Biological control 0.1% matrine water 600 times, 2% avermectin microemulsion 2000 times liquid to control whitefly, aphids, Liriomyza sativae; 6% Huainong special EC 400 times to prevent the downy mildew Diseases, powdery mildew, gray mold, thrips, aphids, red spiders, etc.
6. Smoke Prevention and treatment of powdery mildew, the beginning of gray mold, with 45% chlorothalonil smoke agent (safety) per acre 110-180 grams, 60-75 points, lit a closed shed smoke overnight, usually 7 days smoked Once, smoke 3-4 times; or use 200-250 grams of 10% agent per acre for smoking; downy mildew, anthrax, and 45% of chlorothalonil G, 60-75 points, lit the smoked closed shed overnight, usually 7 days, even smoked 3-4 times.
7. Chemical control (1) Botrytis cinerea can be sprayed with 50% acetaminophen suspension 1500 times, or 40% Shijiale EC 1000 times, or 50% and Ruishui Dispersible Granule 1500 times. (2) Powdery mildew, sprayed with 40% chlorothalonil suspension 600 times, or 40% Fuxing Emulsion 8000 times, or sprayed with 10% Shiho Water Dispersible Granule 1000 times, can be used for both measles. (3) Virus disease, can be used 20% nannanmycin 250 times liquid, or 20% virus A WP 500 times, or 1.5% phytopathogenic Ling emulsion 800 times liquid spray, once every 10 days, even Spray 2-3 times. (4) Downy mildew, at the early stage of disease, 40% chlorothalonil suspension 600x, or 25% amidoxan suspension 1500x, or 10% 科佳suspension 600x spray, 7-10 Once a day, 2-3 times in a row. (5) Phytophthora root rot, at the early stage of disease, 40% chlorothalonil suspension solution 600 times, 25% amipexil suspension 1500 times, or 68% Jinlei water dispersible granules 600 times The roots of the stems or roots are irrigated, 150-200 ml per plant, once every 5-7 days, 2-3 times in succession. (6) Soft rot, early onset, can be sprayed or rooted with 6% chitosan 600 times plus 77% copper hydroxide 600 times, or 30% methobiocin 600 times plus 33.5% quinoline copper 800 times Liquid spray, once every 5-7 days, 2-3 times in succession. (7) Whitefly, which can be sprayed with 70% imidacloprid water dispersible granules 3000 times, or 25% acrylonitrile water dispersible granules 3000 times, or 20% acetamiprid microemulsion 1500 times in the initial stage of the occurrence of whiteflies. Prevention, interval 7-10 days once, continuous 2-3 times. Can be accompanied with aphids and Liriomyza sativae.
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