First, timely medication. This is the key to rational drug use. According to the different types of vegetables, pests and diseases, first select the applicable pesticide varieties, and then consider the optimal period of use.
1. According to the different characteristics of the pest growth period, timely use of drugs. Vegetable pests increase with the age of the insects, and their resistance is also gradually enhanced. The best period of application of pesticides and pesticides should be before the 3rd instar larvae; for the drillworms, such as cotton bollworm, carnivorous, spotted fly, and onion thrips, the eggs should be in the peak period of egg hatching, and the adult can be used. The attractant is trapped and the effect is obvious.
2. Choose the best medication period according to different climates. The control effect of pesticides is closely related to the temperature, such as trichlorfon, dimethoate, and phoxim. The control effect increases with temperature in a certain temperature range. Such pesticides should be used at higher temperatures; Pyrethroid insecticides such as kung fu, bifenthrin, bifenthrin, cyfluthrin, etc., have better control at lower temperatures. Such pesticides should be used in the morning and evening; insecticides, fungicides, herbicides and growth regulators with systemic transport function, when the field is weak, the temperature is low, and the relative humidity of the air begins to rise, the agent Less volatilization, better control effect. Such agents should be used in the afternoon or evening; microbial pesticides are sensitive to light and humidity, and should be used when foggy or dew is more.
3. Select the best period of drug use according to the characteristics of different diseases of vegetable diseases. It should be treated with drugs before the disease is the most serious and the loss of production is heavier. When a protective fungicide is applied, it should be applied before the pathogen infects the crop. Such as vegetable virus disease, it is more difficult to prevent and treat after the onset of disease, it is best to use drugs before the onset of prevention.
4. Select the best time according to the effect of cultivation management after administration. In the winter greenhouse, in order to maintain the temperature of the greenhouse and reduce the humidity of the air, it should be used in the morning or at noon on the sunny day to facilitate the release of air and moisture; the cultivation of open vegetables should be avoided to prevent the rain from diluting the liquid before the rain.
Second, appropriate medicine. At present, pesticides produced at home and abroad are mainly emulsifiable concentrates; fungicides and herbicides are mainly wettable powders. At present, the application method is mainly spray, followed by seed dressing, dusting, dusting, and poisoning.
1. Control underground pests. Seed dressing, poison bait, poisonous soil, root irrigation, soil treatment, etc. can be used.
2. Prevent seed carriers. The seeds can be treated with chemicals, soaked in warm soup, and the like.
3. Use medicine in the production of protected areas. Spray and ignite aerosols are commonly used. The smoke method is better than the spray method. The smoke method has the advantages of convenient use, uniform application, quick quick effect, timely control, high utilization rate, and no increase in air humidity.
4. Different pests and diseases have different characteristics, and the medication sites are different. Such as vegetable downy mildew, gray mold, blight, powdery mildew, scab, black mold, blue mold and rust, etc., should focus on the back of the spray when spraying; anthracnose, ring disease, leaf blight , leaf rot and spot disease, etc., should focus on the front of the spray when applying.
5. Try to enhance the control of pesticides. For example, adding 0.3% of salt to pesticides; adding appropriate amount of copper to avermectin pesticides can enhance the penetration of pesticides and kill more of Liriomyza. Adding 0.5% white sugar to matrine is more advantageous for eliminating whitefly.
1. According to the different characteristics of the pest growth period, timely use of drugs. Vegetable pests increase with the age of the insects, and their resistance is also gradually enhanced. The best period of application of pesticides and pesticides should be before the 3rd instar larvae; for the drillworms, such as cotton bollworm, carnivorous, spotted fly, and onion thrips, the eggs should be in the peak period of egg hatching, and the adult can be used. The attractant is trapped and the effect is obvious.
2. Choose the best medication period according to different climates. The control effect of pesticides is closely related to the temperature, such as trichlorfon, dimethoate, and phoxim. The control effect increases with temperature in a certain temperature range. Such pesticides should be used at higher temperatures; Pyrethroid insecticides such as kung fu, bifenthrin, bifenthrin, cyfluthrin, etc., have better control at lower temperatures. Such pesticides should be used in the morning and evening; insecticides, fungicides, herbicides and growth regulators with systemic transport function, when the field is weak, the temperature is low, and the relative humidity of the air begins to rise, the agent Less volatilization, better control effect. Such agents should be used in the afternoon or evening; microbial pesticides are sensitive to light and humidity, and should be used when foggy or dew is more.
3. Select the best period of drug use according to the characteristics of different diseases of vegetable diseases. It should be treated with drugs before the disease is the most serious and the loss of production is heavier. When a protective fungicide is applied, it should be applied before the pathogen infects the crop. Such as vegetable virus disease, it is more difficult to prevent and treat after the onset of disease, it is best to use drugs before the onset of prevention.
4. Select the best time according to the effect of cultivation management after administration. In the winter greenhouse, in order to maintain the temperature of the greenhouse and reduce the humidity of the air, it should be used in the morning or at noon on the sunny day to facilitate the release of air and moisture; the cultivation of open vegetables should be avoided to prevent the rain from diluting the liquid before the rain.
Second, appropriate medicine. At present, pesticides produced at home and abroad are mainly emulsifiable concentrates; fungicides and herbicides are mainly wettable powders. At present, the application method is mainly spray, followed by seed dressing, dusting, dusting, and poisoning.
1. Control underground pests. Seed dressing, poison bait, poisonous soil, root irrigation, soil treatment, etc. can be used.
2. Prevent seed carriers. The seeds can be treated with chemicals, soaked in warm soup, and the like.
3. Use medicine in the production of protected areas. Spray and ignite aerosols are commonly used. The smoke method is better than the spray method. The smoke method has the advantages of convenient use, uniform application, quick quick effect, timely control, high utilization rate, and no increase in air humidity.
4. Different pests and diseases have different characteristics, and the medication sites are different. Such as vegetable downy mildew, gray mold, blight, powdery mildew, scab, black mold, blue mold and rust, etc., should focus on the back of the spray when spraying; anthracnose, ring disease, leaf blight , leaf rot and spot disease, etc., should focus on the front of the spray when applying.
5. Try to enhance the control of pesticides. For example, adding 0.3% of salt to pesticides; adding appropriate amount of copper to avermectin pesticides can enhance the penetration of pesticides and kill more of Liriomyza. Adding 0.5% white sugar to matrine is more advantageous for eliminating whitefly.
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