Melon is an annual vine herb of Cucurbitaceae Cucumber. The shape of fruit and the color of peel are different depending on the variety. At present, it can be planted all over China. If it is not properly managed, it will cause disease. Then, how can we prevent and cure downy mildew? First, the introduction of melon! 1. Is melon a fruit or a vegetable? Melon is a fruit, which is generally ripe in summer. The flesh can be eaten raw, sweet and delicious. It can also be processed into dried melon, melon, melon juice, canned melon, melon, melon, melon and other products. 2. What are the melon varieties? According to the ecological characteristics, China's melons are usually divided into thick-skinned melons and thin-skinned melons. Thick-skinned melons mainly include netted melons, winter melons, and cantaloupe melons, which are mainly distributed in northwestern regions such as Xinjiang and Gansu; melons are widely cultivated in China. Northeast and North China are the main producing areas. Second, how to prevent and cure melon downy mildew? 1. What are the symptoms of melon downy mildew? Melon downy mildew is a fungal disease against melon attack, which mainly damages the leaves, causes disease in the seedling stage, produces water-stained small spots on the cotyledons, and then expands into light brown lesions. When the humidity is high, the grayish mildew grows on the back of the leaves. Layer; adult disease, light yellow lesions on the leaf surface, late lesions turn into light brown or yellow-brown polygonal spots, under continuous rainfall conditions, the lesions rapidly expand or fuse into large plaques, leading to leaf roll Or dry, the lower leaves are all dry. 2. What are the prevention and treatment methods for melon downy mildew? (1) Agricultural control: First, select the varieties that are resistant to downy mildew; secondly, rationally fertilize, increase the application of organic fertilizer, and apply nitrogen, phosphorus and potassium together; once again, choose irrigation on sunny days in the morning, prohibit flooding and flooding After dehumidification in time; finally, weeding and vines in time to keep the plants well ventilated. (2) Nutritional control: After the melon is flowering, after 4-5 pm on a sunny day, 0.2 kg of urea per acre, 0.5 kg of sugar (or brown sugar), and 40-50 kg of water on the foliar surface, every 5-6 days. Once, spray 4-5 times to enhance the disease resistance of the plant and prevent the disease. (3) Plant control: In the early stage of the disease, 0.2kg of small pepper, ginger or garlic per acre is chopped, wrapped in gauze, placed in 50kg of water to filter out the juice, sprayed and sprayed, and sprayed after 3 days. After that, spray once every 7 days, then spray 2-3 times. (4) Chemical control: It can be sprayed with chemical control, such as 25% syphilis WP or 25% metalaxyl WP 800-1000 times, 60-70 kg per acre, 7-10 Spray once a day, continuous control for 3 to 4 times, and spray for 4 hours after spraying. (5) Removal and prevention: For diseased leaves with downy mildew, it is necessary to remove or remove the diseased plants in time to burn or bury them deeply, do not discard the fields and roadsides, and avoid neighboring or continuous cropping with melon crops. 3. What are the differences between melon and cantaloupe? Difference 1. Different origin: Melon is mainly produced in the sunny northern region. The individual is large and the shape is round or elliptical. The melon is mainly produced in the southern part with relatively large precipitation. The individual is small and the shape is mostly round. . The difference 2, the shape is different: melon is generally green, yellow, white, the melon skin is thicker, it is easy to crack after maturity; the melon has golden yellow, light green, white, the melon skin is thin, not easy to rupture . Difference 3: Sweetness is different: Melon is produced in the north, with sufficient sunlight, sufficient photosynthesis, less consumption at night, more sugar content, and the fruit and fruit are light and sweet; The precipitation is relatively large, the light is insufficient, the growth period is short, and the converted sugar content is small, and the produced fruit has a rich aroma and insufficient sweetness. The above is the introduction of the prevention and treatment of melon downy mildew. In fact, melon and cantaloupe are the plants of the genus Cucurbitaceae. They are essentially the same kind of melons, but the varieties are different. There are three different methods to help everyone. Distinguish each other. 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