The main diseases in the process of cucumber planting include downy mildew, target spot disease, bacterial angular leaf spot and powdery mildew. Once infected, these diseases have a great impact on the growth and development of cucumber, affecting the commerciality of cucumber and causing economics for growers. Loss, the following describes the prevention and treatment of the main diseases of cucumber. Downy mildew Downy mildew is an explosive and epidemic foliar disease, mainly prevention. After planting, it is controlled with 75% chlorothalonil WP 800 times, sprayed once every 7 to 10 days, and fumigation with 45% chlorothalonil 3 kg/hm2 when the humidity is high after watering. After the onset, 687.5 g / L of fluorobacteria · chlorfluazil (silfane) suspension 25mL with water 15kg spray, spray once every 5 days; or spray 72% sulphur urea cyanide manganese zinc (DuPont · gram Exposure) 600 to 800 times solution, spray once every 5 to 7 days; or 80% enoylmorpholine water-dispersible granules 20g with water 15 kg spray, once every 5 to 7 days, the drug is used alternately. Target spot disease The target spot disease is also called "small yellow spot" disease, which has occurred severely in recent years. It is similar to downy mildew and is different, and it is difficult to prevent and cure than downy mildew, and it is easy to be confused with angular spot disease. At the beginning of the target spot disease, the edge of the leaf is water-soaked, but there is no mold layer on the back of the leaf, and there is a yellow spot similar to downy mildew. The difference of the same spot spot disease is that the lesion is not perforated. Control method: mainly for prevention, after the occurrence of 50% boscal carbamide (Kaiser) wettable powder 8g + 80% mancozeb (Dasheng M-45) wettable powder 25g with water 15kg spray; or use 21.4 % fluopyram + 21.4% sputum lipid suspension (Lu Nasen) 10 mL spray with water 15kg, spray once every 5 to 7 days; or 52% fluopyram + 4% zhongshengmycin Wet powder 25g was sprayed against 15kg of water. Bacterial angular spot The difference between bacterial keratosis and downy mildew and target spot disease is irregular polygon, brittle and not broken, and the back lesion has a "bacterial pus" overflow. The control can be sprayed with 30% succinic acid copper (DT) bactericide 500-800 times, spray once every 5-7 days; or 50% chlorobromoisocyanuric acid 2000~2500 times spray every 5~ Spray once every 7 days; or 46% copper hydroxide (can kill 3000) water dispersible granules 10g spray with water 15kg, spray once every 5 to 7 days. powdery mildew The front side or the back side of the leaf produces a small white spot with a small round shape. In the later stage, the diseased part expands into an inconspicuous large white powder area, which is covered with leaf surface and seems to be sprinkled with a layer of flour. 10% difenoconazole (Shigao) water-dispersible granules 10g with water 15kg spray, spray once every 5 to 7 days; or 12.5% ​​myclobutanil suspension 1500-2000 times liquid spray; or 30% Ethyl sulfonate sulfonate + 7.5% pyraclostrobin 20mL spray with water 15kg, spray once every 5 to 7 days, alternate medication to avoid drug resistance. The above is the main disease of cucumber. If the growers only take good control measures, they don't have to worry too much about the damage caused by the disease. High Pressure Extension Tubings,high pressure PVC extension tube,Extension Tubings,extension tube medical Anesthesia Medical Co., Ltd. , https://www.trustfulmedical.com
