Downy mildew on cucumbers and grapes can damage both adult plants at the seedling stage and mainly damages leaves and stems, with less damage to tendrils and pedicels. Downy mildew has an important impact on the growth of cucumbers and grapes, and is directly related to the yield of cucumbers and grapes. So how to prevent and control downy mildew? Today, I would like to introduce to you a special drug for preventing and treating downy mildew, which is dimethomorph.
1. Product features
Dimethomorph mainly acts on pathogens in the following three aspects: preventive effect, which can prevent the germination and invasion of bacterial spores. The therapeutic effect can penetrate into plant tissue and kill fungal hyphae; the anti-spore effect can prevent the formation of bacterial spores and reduce the source of infection.
This unique mechanism of action and the characteristics of multiple action stages make dimorpholine have excellent control effects on downy mildew and blight.
(1) Good effect and long lasting effect
Dimethomorph has a unique mechanism of action, effectively acts on all growth stages of Oomycete fungi, and has special effects on various downy mildews and epidemic diseases. It has both preventive and therapeutic effects, as well as anti-sporulation effects.
The application interval of dimethomorph is usually about 7-10 days, which is 3-4 days longer than other agents. It has a long lasting effect, reduces the number of applications, and saves time and costs.
(2) Will not produce drug resistance
Dimethomorph has no cross-resistance with other fungicides such as metalaxyl and cymoxanil, and is highly miscible. It can quickly kill bacteria that are resistant to other fungicides and ensure stable efficacy.
(3) Resistant to rain erosion
It is super water-soluble and dispersible, has strong penetrating effect, can quickly penetrate the leaves and spread locally, and is resistant to rain erosion. The efficacy is almost unaffected by rain 1 hour after spraying.
Enhance plant photosynthesis, make fruits and vegetables brighter, and comprehensively improve crop yield and quality.
(4) Good compoundability
Dimethomorph can be compounded with pyraclostrobin, azoxystrobin, cymoxanil, mancozeb, propenzeb, mesostrobin, thiram, chlorothalonil, aluminum triethylphosphonate, pyraclostrobin, aminooligosaccharides, prochloraz, metalaxyl, zhongshengmycin, iprodione, etc.
(5) Good safety
Dimethomorph is also very safe even when used during the flowering and fruit expansion stages.
2. Scope of application
Grapes, lychees, cucumbers, melons, bitter melons, tomatoes, peppers, potatoes, cruciferous vegetables.
Dimethomorph has a good control effect on downy mildew, downy mildew, late blight, blight (mildew), Phytophthora rot, pythium, black shank and other low fungal diseases. On vegetables, it can prevent and control cucumber downy mildew, melon downy mildew, taro blight, pepper blight, cruciferous vegetable downy mildew, etc.
Dimethomorph dosage forms include 25%, 30%, 50% wettable powder, 25% microemulsion, 10%, 20%, 40%, 50% suspending agent, 40%, 50%, 80% water-dispersible granules, 50% effervescent tablet, 10%, 15% water emulsion. Dimethomorph is a white powder or crystal. It is hydrolytically stable under normal conditions and is stable for more than 5 years under dark conditions.
3. How to use
(1) Prevent and control downy mildew on cucumbers, melons, bitter melons and other melons. Start applying pesticides before or at the beginning of the disease. Use 30-40 grams of 50% water-dispersible granules or 50% wettable powder, 20-25 grams of 80% water-dispersible granules, and 40-50 grams of 40% water-dispersible granules per acre. , 60-80 grams of 25% wettable powder, 150-200 ml of 10% water emulsion, mix with 45-75 kg of water and spray. Apply once every 7-10 days, alternately use different types of pesticides, focus on the back of the leaves, and apply 3 times in a row.
(2) Prevent and control pepper diseases. Start spraying before the onset of the disease or in the early stages of the disease. Use 30-40 grams of 50% wettable powder per acre and mix it with 50-75% water for spraying. Depending on the development of the disease, the medication should be administered once every 5-7 days and 3 times continuously.
(3) Prevent and control tomato late blight. In the early stage of the disease, use 40-60 grams of 50% wettable powder and 40-50 kilograms of water for spraying.
(4) Prevention and control of tomato Phytophthora root rot. In the early stage of the disease, pour 50% wettable powder 2000 times or 50% boscalid water-dispersible granules 1000 times mixed with 50% dimethomorph water-dispersible granules 750 times.
(5) Prevention and control of potato late blight. Start spraying at the early stage of the disease, using 1000 times of 50% wettable powder. Spray once every 7-10 days and use it alternately with different types of agents.
(6) Prevent and control lettuce downy mildew. Start spraying at the early stage of the disease, using 1000 times of 50% wettable powder. Spray once every 7-10 days, and spray about 2 times in a row, focusing on the back of the leaves.
(7) Prevention and control of downy mildew on cruciferous vegetables. Use 20-25 grams of 80% water-dispersible granules per acre or 50% wettable powder, 30-40 grams of 50% water-dispersible granules, and 30-40 grams of 40% water-dispersible granules., 40-60 grams of 25% wettable powder, 100-150 ml of 10% water emulsion, mix with 30-45 kg of water and spray.
(8) Prevent and control seedling diseases, damping-off disease, and stem base diseases of fruits and vegetables. Begin to irrigate (or spray) the seedbed or the base of the plant stem with the medicinal solution from the first appearance of the diseased plant, once in about 10 days, and apply the medicinal solution twice in a row. Generally use 80% water dispersible granules 2000-3000 times liquid or 50% wettable powder, 50% water dispersible granules 1500-2000 times liquid, 40% water dispersible granules 1000-1500 times liquid, 10% water emulsion 300- 400 times liquid.
(9) Prevent and control crop diseases of melons, solanaceous fruits, and leafy vegetables. Generally, 35-50 grams of active ingredients are used per acre, and 30-60 kilograms of water are used for spraying. Medication is most effective before the disease occurs or when the lesions first appear.
(10) Control downy mildew on green onions and onions. In the early stage of the disease, spray with 50% wettable powder 600 times liquid. Spray once every 7-10 days and control 2-3 times continuously.
(11) Prevention and control of strawberry Pythium root rot. During the growth period, spray 50% wettable powder 2000 times.
(12) Prevent and control Phytophthora root rot in strawberry. Pour 2000 times of 50% dimethomorph wettable powder or 600-800 times of 69% dimethoyl manganese zinc wettable powder.
(13) Prevention and control of potato late blight. Spray with 50% wettable powder 1500 times liquid.
