What are the specific drugs for powdery mildew? Recommended commonly used control agents
Powdery mildew mainly damages the leaves of crops, and also damages stems and ears. It can occur from the seedling stage to the heading stage. On the leaves, small yellow spots first appear, then expand and develop into round or oval lesions, with a white powdery mold layer on the surface. It is caused by wheat powdery mildew fungus, mainly damaging wheat, barley, rye, oats, etc. Let's take a look below at what specific drugs there are for powdery mildew!
Specific drugs for cucumber powdery mildew
During the disease period, use 50 grams of Kongbai wettable powder per mu, or Kongbai aqueous emulsion, or 5% chlorothalonil dust, or sublimed sulfur powder for dusting. In particular, it should be mentioned that spraying with a 0.1-0.2% baking soda solution gives good control results. Baking soda is a weakly alkaline substance and can inhibit the growth and spread of many fungi. After spraying, it can decompose into water and carbon dioxide, and also has the effect of promoting photosynthesis, and it is inexpensive, safe, and pollution-free.
Specific drugs for rose powdery mildew
Before budding, spray 5 lime-sulfur mixture; in the early stage of disease, spray 25% triadimefon wettable powder at 1500 times dilution, or spray 70% thiophanate-methyl wettable powder at 1000 times dilution, or spray 15% triadimefon wettable powder at 1000 times dilution, or spray 0.02-0.03% potassium permanganate solution.
Specific drugs for melon powdery mildew
1. Add 15 kg of water to every 20-30 ml of upgraded precise compound of ethirimol and kresoxim-methyl (Kongbai). Spray once every 7 days, 2-3 sprays. This drug is used in plots where powdery mildew occurs alone or where downy mildew also occurs mildly at the same time. Note that when mixing the drug, it must not be mixed with any other pesticides or fertilizers. Clean water should be used for mixing, and canal water must be settled before it can be used for mixing.
2. Spray 80% sulfur at 400 times dilution plus 72% benalaxyl-cymoxanil at 600 times dilution; 150 grams of sulfur plus 100 grams of benalaxyl-cymoxanil added to 60 kg of water; triazole fungicides such as myclobutanil and triflumizole can also be used.
Specific drugs for grape powdery mildew
1. Before grape buds swell but before they sprout, spray 3-5 degrees Baume lime-sulfur mixture or 45% crystalline lime-sulfur mixture at 40-50 times dilution. Starting in June, spray Bordeaux mixture once every 15 days, continuously 2-3 times for prevention.
2. Spray drugs in the early stage of disease for control: 300 million CFU/g Trichoderma harzianum wettable powder at 300 times dilution, 10% flusilazole at 1500 times dilution, 70% thiophanate-methyl wettable powder at 1000 times dilution, ethirimol Kongbai at 800 times dilution, 40% carbendazim · sulfur suspension concentrate at 600 times dilution, 50% sulfur suspension concentrate at 200-300 times dilution, kresoxim-methyl Kongbai at 8000-1000 times dilution, 200/0 triadimefon sulfur triadimefon · sulfur suspension concentrate at 2000 times dilution, 56% azoxystrobin chlorothalonil at 600 times dilution.
Specific drugs for wheat powdery mildew
1. Spray drugs for control in the early stage of disease in spring. Per mu, choose 80-100 grams of 15% triadimefon wettable powder or 20-30 grams of 12.5% diniconazole wettable powder, add 80-100 grams of potassium dihydrogen phosphate or 50 grams of chitosan, mix evenly, then dilute with 30-45 kg of water and spray evenly. Generally spray 1-2 times, which can achieve the goals of drought resistance and disease prevention, preventing dry hot wind, and improving plant stress resistance.
2. During the wheat jointing stage, spray 30 kg of 200 micrograms/ml paclobutrazol solution per mu, which can dwarf the plants, enhance lodging resistance, and also control wheat powdery mildew, improving the plant's absorption and utilization rate of nitrogen.
3. When the diseased plant rate reaches 15-30% or the diseased leaf rate reaches 8-15% at the booting and heading stages of wheat, per mu use 50 grams of 15% triadimefon wettable powder or 40 grams of 20% triadimefon emulsifiable concentrate per mu, dilute with 10 kg of water and spray. Generally, one control application can control the disease.