The greenhouse seedlings are mainly carried out in winter and spring. In this period, good disease prevention and control will play a pivotal role in increasing production and income. A brief introduction to the methods of chemical control is now available.
I. Fumigation and disinfection in the greenhouse 1. Before planting, 250 grams of sulfur powder and 500 grams of sawdust per 160 square meters will be used to disinfect the smoke at 19:00 in the evening. The temperature during fumigation is kept at 20 ° C. At the same time, there should be no green plants in the shed to avoid phytotoxicity.
2, the soil disinfection and planting 20 days before the application of ditch, the ditch depth of 15-20 cm, the groove distance of 20-30 cm, 50% cotton WP WP 2.5 kg per acre, fine soil 40-50 kg, formulated into poison The soil is sprinkled into the ditch and then covered and compacted. Loose soil 3-4 days before sowing to prevent phytotoxicity.
3. Disinfection of the frame The spray is applied with a 1% potassium permanganate solution to completely disinfect the frame.
Second, the cultivation of disease-free strong seedlings 1, seed bed disinfection with 40% pentachloronitrobenzene powder, 5% Fumei double wettable powder and 25% metalaxyl WP powder mixed, such as 8 grams per square meter. First mix the pesticide with the appropriate amount of fine soil, then 1/3 of the amount of the soil is sprinkled into the soil that has been poured or planted into the ditch, and then planted, and the remaining 2/3 of the soil is covered on the seed, and finally covered with soil. . Or use 10 ml of formalin 360 ml of water per 10 m2, and pour it on the seedbed soil 20 days before sowing, then cover it with plastic film or sack for 4-5 days, remove the cover and then place the bed soil.耙 loose, dry until 2 weeks before you can sow.
2, seedling disease prevention and control 1 with 70% mancozeb WP plus 25% metalaxyl WP 1800 times spray, can prevent rickets, blight, root rot. 2 Use 50% Fumei double wettable powder and 25% metalaxyl WP 1:1 mixture to mix the appropriate amount of dry fine soil or fine sand, evenly spread on the diseased seedlings, and use the soil around the diseased seedlings to form a " "medicine" to prevent disease expansion. 3 Apply 7 times of “marriage medicine†7 to 10 days before planting to prevent the seedling disease from being brought to the planting field. Among them: melons, 75% white fungus wettable powder 1:1:1, 800 times liquid and 98% chlorotoxin original powder 5000 times liquid spray, can prevent downy mildew, gray poison, black star disease, horn Spot disease. Tomato, pepper with agricultural streptomycin plus 5% Fumei double wettable powder 25% metalaxyl WP 1:1: 1, 800 times liquid spray, can prevent gray mold, disease, anthracnose, scab, etc. .
I. Fumigation and disinfection in the greenhouse 1. Before planting, 250 grams of sulfur powder and 500 grams of sawdust per 160 square meters will be used to disinfect the smoke at 19:00 in the evening. The temperature during fumigation is kept at 20 ° C. At the same time, there should be no green plants in the shed to avoid phytotoxicity.
2, the soil disinfection and planting 20 days before the application of ditch, the ditch depth of 15-20 cm, the groove distance of 20-30 cm, 50% cotton WP WP 2.5 kg per acre, fine soil 40-50 kg, formulated into poison The soil is sprinkled into the ditch and then covered and compacted. Loose soil 3-4 days before sowing to prevent phytotoxicity.
3. Disinfection of the frame The spray is applied with a 1% potassium permanganate solution to completely disinfect the frame.
Second, the cultivation of disease-free strong seedlings 1, seed bed disinfection with 40% pentachloronitrobenzene powder, 5% Fumei double wettable powder and 25% metalaxyl WP powder mixed, such as 8 grams per square meter. First mix the pesticide with the appropriate amount of fine soil, then 1/3 of the amount of the soil is sprinkled into the soil that has been poured or planted into the ditch, and then planted, and the remaining 2/3 of the soil is covered on the seed, and finally covered with soil. . Or use 10 ml of formalin 360 ml of water per 10 m2, and pour it on the seedbed soil 20 days before sowing, then cover it with plastic film or sack for 4-5 days, remove the cover and then place the bed soil.耙 loose, dry until 2 weeks before you can sow.
2, seedling disease prevention and control 1 with 70% mancozeb WP plus 25% metalaxyl WP 1800 times spray, can prevent rickets, blight, root rot. 2 Use 50% Fumei double wettable powder and 25% metalaxyl WP 1:1 mixture to mix the appropriate amount of dry fine soil or fine sand, evenly spread on the diseased seedlings, and use the soil around the diseased seedlings to form a " "medicine" to prevent disease expansion. 3 Apply 7 times of “marriage medicine†7 to 10 days before planting to prevent the seedling disease from being brought to the planting field. Among them: melons, 75% white fungus wettable powder 1:1:1, 800 times liquid and 98% chlorotoxin original powder 5000 times liquid spray, can prevent downy mildew, gray poison, black star disease, horn Spot disease. Tomato, pepper with agricultural streptomycin plus 5% Fumei double wettable powder 25% metalaxyl WP 1:1: 1, 800 times liquid spray, can prevent gray mold, disease, anthracnose, scab, etc. .
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