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1, selection of resistant varieties generally produce soil selection of rapeseed varieties of Brassica is more resistant.
2. Seed treatment Before sowing, rape seeds can be screened, selected by wind, and sclerotia removed.
3. Rotation of rape sclerotinia occurs in heavier plots. Conditional planting should be carried out every other year for crop rotation. Do not rotate with cruciferous crops and leguminous crops.
4. Strengthen the management of field diseases The field with heavy disease can be used for deep plowing in the autumn. The topsoil will be turned into the lower layer and the sclerotia will be buried deeply so that the ascarnal plate will not grow. At the beginning of the master craftsman's pouch, the middle cultivator was used to cut off the ascidian disks to reduce the bacteria source. The Sclerotinia disease eradicates old yellow leaves in a timely manner, reducing the number of diseased bridges. In addition, we should ditch and drain, reduce soil moisture, reasonably dense planting, reasonable application of nitrogen fertilizer, increase potassium fertilizer, improve disease resistance ability of rapeseed, and maintain ventilation and light in the field, which can effectively reduce the incidence.
5. Chemical control According to the disease forecast, the spraying time is the peak during the formation of the ascidian disk (usually during the flowering period of rapeseed) and the spread of the disease (usually during the final flowering period of rapeseed). Thoughtful, so as not to affect the effect. In recent years, chemical agents with good control effect and commonly used are: 40% carbendazim gel suspension, 100-150 ml per acre, 60 kg water spray, 36% powdery mildew is a suspension agent (carbendazim-triazolone ), 100 grams per acre, spray 30 to 50 kg of water; 40% of Wei Wei Granule Suspension, 150 ml per mu, 60 kg of water spray; Bacteria 100 g 25% Mi Xianan EC, 30-40 per mu Milliliter, 45 to 60 kg of water spray.
Stalk sclerotinia comprehensive prevention and control technology
In the past 23 years, Sclerotinia sclerotiorum disease in our country has become more serious. Some farmers have failed to prevent and treat it, and the reduction in production has become more serious. In order to do a good job of prevention and control of sclerotinia in rapeseed production, based on practical experience, comprehensive prevention and control measures should be adopted for prevention and treatment.