Control of Cucumber Scab in Sheds
Cucumber scab is a fungal disease caused by the infection of Cladosporium cucurbitae. In winter, even in the event of rain, snow, lack of light, plant closure, excessive humidity in the shed, and continuous weight loss, it will aggravate the occurrence of the disease. . Cucumber scab disease both harms the leaves, stems, and melons. Diseased leaf disease, began to produce green spots, nearly round, gradually expanding and quickly dried up, forming a round or near-round yellow-white lesions, leaving a star-shaped edge of the lesion after perforation. On stem vines, the diseased part is first stained with water, then turns greenish or dark brown, and there are long depressions on the lesions. The surface is cracked, often has a gray moldy layer, and finally rots, causing cucumber plants to wilt. . In the onset of melon strips, the lesions were first dark green, sore and scab-like, and then cracked or rotted. The diseased department developed a white translucent jelly that became amber after aging and became dry and shedding. Control methods 1. Agricultural control (1) Selection of disease-free seeds and seed treatment: In addition to selection of resistant varieties such as Qingza No.1, No.2 and Jiza No.2, the seeds should be sterilized and soaked in warm water at 50°C for 30 minutes. After the removal of germination sowing. Seed dressing can also be carried out with 50% carbendazim WP with a seed weight of 0.4%. (2) Rotation: Two to three years of rotation between non-guarantee and non-guarantee crops. (3) Controlling watering: The cucumbers in the greenhouse are planted until the guava period and the watering is strictly controlled so as to increase the ground temperature and reduce the humidity. 2. Chemical control Smoke or spray dust: greenhouse cucumber 10 days before transplanting, with 2.4 grams of sulfur per square meter of space, add 4.5 grams of sawdust and mix well, then place a closed smoke smoke 1 night. When you first see the disease, use 45% chlorothalonil aerosol, 250 grams per mu, or spray 10% carbendazim chlorothalonil dust agent, 1 kg per mu. Chemical control can be sprayed with 50% carbendazim WP 500 times, or 70% thiophanate-methyl wettable powder 1000 times, or 75% chlorothalonil wettable powder 600 times, or 50% benomyl Wettable powder 1500 times, spray about 7 days, even spray 2 to 4 times. Cleaning Ball,Sanitary Tri-Clamp Cleaning Ball,Sanitary Tank Cip Spray Ball,Cleaning Ball With Revolving Ball Wenzhou Gaoya Light Industry Machinery Co.,ltd. , https://www.hongyafitting.com