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How to apply fungicides for effective control of powdery mildew on melons
1. Choose disease-resistant varieties. Disease resistance varies noticeably among different melon varieties, so choosing disease-resistant varieties is key to controlling the severity of the disease. 2. Clean up the field. After harvest, weeds and crop residues should be removed promptly; during the melon growing season, weed promptly, remove diseased leaves, and take weeds, residues, and diseased leaves...
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How to prevent and control soybean downy mildew? Detailed explanation of control methods
[Distribution and damage] It occurs in all major soybean-producing areas across the country, and is especially common in the cold-temperate Northeast and North China regions. This disease is caused by infection with the fungus Peronospora manshurica (Naum.) Jyd. et Gaum. It generally reduces yield by 6%-15%, with about 10% of seeds damaged. In addition to harming large...
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How to prevent and control downy mildew in cabbage? Detailed explanation of control methods
In the early stage of the disease, pesticides such as 75% chlorothalonil wettable powder 600-800 times dilution and 70% mancozeb wettable powder 800 times dilution can be used for preventive protection. In mid-September, the early stage of the disease is the key period for control. You can use 58% metalaxyl·mancozeb wettable powder N700 times dilution, 20% flumorph wettable powder l000 times dilution, 60% flumorph...
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Integrated control methods for downy mildew in autumn garland chrysanthemum
Downy mildew in garland chrysanthemum mainly damages the leaves. In the early stage of the disease, pale yellow nearly round or polygonal lesions appear on the old leaves in the lower part of the plant, gradually spreading to the middle and upper parts of the plant; in the later stage the lesions become yellowish brown, and when the disease is severe the lesions merge into one patch and the leaves turn yellow and die. When humidity is high, white mold develops on the underside of the lesions. The pathogen infects...
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Control Methods and Technical Key Points for Grape Downy Mildew
Control methods: 1. Remove fallen leaves and diseased branches, bury them deep or burn them. 2. Timely pinch off growing tips, prune, drain and weed, and apply more phosphorus and potassium fertilizer. 3. At the early stage of the disease, that is, after July, apply chemicals as soon as slight lesions are seen on the underside of leaves. The chemicals include: Pubo, Ridomil, Sandofan, metalaxyl, Shuangmeiyitejing, etc., used alternately, spraying 4 to 5 times in a row...
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Symptom Identification and Control Methods for Sorghum Downy Mildew
Sorghum seedling blight - Symptoms: The disease can occur when sorghum grows to 4-5 leaves. It starts from the lower leaves and then spreads upward. Infected leaves develop purplish-red streaks that gradually merge, causing the leaves to gradually die from the tip, and the seeds turn very brown. Sorghum seedling blight - Pathogen: Known as Fusarium moniliforme, a fungus belonging to the subphylum Deuteromycotina. On PDA medium...
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How to carry out integrated control of cowpea rust and powdery mildew in greenhouses?
At the early stage of the disease, spray 70% thiophanate-methyl wettable powder at 500 times dilution, or 40% copper oxychloride wettable powder at 600 times dilution, 50% sulfur suspension concentrate at 300 times dilution, or Fenbiqing at 150 times dilution. Spray 2 to 3 times consecutively, at 5 to 7 day intervals.
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What are the control methods for sunflower downy mildew?
(1) Establish disease-free seed-production fields. Strictly prohibit the introduction of seed from diseased areas, and do everything possible to protect disease-free areas. (2) Practice a 3-5 year rotation with grass-family crops. (3) Choose disease-resistant varieties such as Liaokui No. 2, Fenkuiza No. 2, Kang 3A x Hui 6, CM592, etc. (4) For suspected downy mildew, test the sunflower's inner pericarp and...
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What are the control methods for sunflower downy mildew?
(1) Establish disease-free seed production fields. Strictly prohibit the introduction of seeds from diseased areas, and do everything possible to protect disease-free areas. (2) Practice a 3-5 year rotation with grass-family crops. (3) Choose disease-resistant varieties such as Liaokui No. 2, Fenkuiza No. 2, Kang 3A x Hui 6, CM592, etc. (4) If downy mildew is suspected, test the sunflower's inner pericarp and...
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How to prevent and control strawberry powdery mildew? Master these methods
How to prevent and control strawberry powdery mildew? Please advise. Strawberry powdery mildew can be prevented and controlled by referring to the following techniques: 1. Disease symptoms. It mainly damages leaves, flowers, fruit stems and fruits, and rarely occurs on runners. In the early stage of leaf infection, a thin frost-like white powdery substance appears locally on the underside of the leaves, and then rapidly spreads to the whole plant. As the disease worsens...
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