Fusarium wilt, also known as wilt disease, turfgrass disease, and death plague, occurs in various parts of the province. It is a devastating disease of watermelon because it causes death. The diseased plants grew slowly and the root and stem vascular bundles turned brown. The initial disease strain recovered during the day and wilted at night, and the whole plant died after 5-6 days. The roots decayed into hemp. It takes the heaviest time between flowering and early melon. The disease is caused by Fusarium oxysporum infestation. Mycelium, chlamydospore and sclerotium are overwintering in soil, diseased bodies and organic manure without decomposition, and can survive in soil for 5-6 years. Up to 10 years or more. The conidia attached to the seeds can also be overwintering, allowing long-distance transmission. Underground pests, agricultural tools, human operations and irrigation water can also be transmitted diseases. The weather is hot, rainy, soil moisture, poor drainage, partial application of nitrogen fertilizer, organic fertilizer applied bacteria, and even the incidence of heavy.
Control methods: 1. Rational rotation: 7-8 years of rotation with dryland crops. 2. Select disease-resistant varieties: According to the local conditions, select the species with high yield and disease resistance according to local conditions. 3. Seed Disinfection: Use 70% thiophanate-methyl (thiophanate-methyl) WP 100 times and soak for 60 minutes. 4. Application of medicinal soil when sowing or transplanting: Use 50% carbendazim, 70% thiophanate-methyl (thiophanate-methyl) WP, medicine: Soil (fertility) ratio is 1:10 to make medicine soil (Drug Fertilizer) When sowing or transplanting, apply 10 grams of medicinal soil (pharmaceutical fertilizer) per hole to prevent the infection of pathogens in the soil. 5. Irrigation prevention and control: For diseased plants found in the field, seize the initial stage of onset with 30% methyl methacrylate, fmyloin (Rui Miaoqing) water solution 3000 times, or 70% thiophanate-methyl (thiophanate-methyl) ) Wettable powder 500-1000 times liquid irrigation control. About 0.25 liters of liquid per strain. Once the roots are not healed, irrigate every other day. 6. Remove the diseased plants, concentrate burned, eliminate the source of sterilization: The deaths were found in the fields, and they were removed in time and burned in a concentrated manner. They could not be thrown anywhere. For the diseased points after the diseased plants are removed, they should be limed or disinfected by applying root liquids. 7. Field health: After the watermelon is harvested, the quails will be burnt and destroyed.
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com