Chrysanthemum planting technique: how to control powdery mildew by planting chrysanthemum?

How to control powdery mildew by planting chrysanthemums? Please introduce the prevention and control of chrysanthemum powdery mildew by referring to the following methods: 1. In garden cleaning, attention should be paid to cutting off overdense and withered yellow leaves, pulling out diseased plants, cleaning diseased and residual leaves, concentrated burning or deep burial, which can greatly reduce the source of pathogen infection. 2. Strengthen production management and planting should not be too dense, control soil moisture, increase ventilation and light transmission. To avoid excessive application of nitrogen fertilizer, we should apply more phosphorus and potassium fertilizer to enhance the disease resistance of plant leaves. Attention should be paid to keeping the leaves dry during watering to prevent water droplets from splashing and spreading, or high temperature and humidity, invading the host and causing re-infection. 3, drug control basin soil or seedbed, soil drug sterilization, you can use 50% thiophanate methyl and 50% thiophanate (1:1) mixture 600mur700 times liquid spray basin soil or seedbed, soil, can achieve germicidal effect. At the initial stage of the disease, the disease can be sprayed with 100x emulsion of agricultural antibiotic 120 or antibacterial B0Mel 10, or 1000 times of Ruinong wet powder or 75% thirteen morpholine emulsion, sprayed once every 10 days, and sprayed 3 times continuously to control the occurrence and spread of the disease. In particular, with 25% enemy power to remove (propiconazole) EC 20ml plus 100 kg of water spray, spray once every 15 days, continuous spray 2 Mel 3 times, the prevention and control effect is better. In addition, during the onset period, 70% methyl thiophanate wettable powder 32m 48g, or 50% methyl thiophanate wettable powder 45m 67.5g, add water 70kg, stir and spray, spray once every 7Mel 10 days, spray 2Mel 3 times in a row You can also use 1500 times of 15% trimethoprim emulsion, 800Mel 1000x solution of 70% methyl topiramate wettable powder, 300x solution of 50% polysulfide suspension, or 2000 times of 20% chlorothalonil EC or 1000 times of 75% chlorothalonil wettable powder, spraying once every 7 times every 10 days for 4 times in a row. Click for more chrysanthemum planting techniques click to get more flower planting techniques