Control methods of Sclerotinia sclerotiorum in sunflower

In order to control Sclerotinia sclerotiorum, we should first pay attention to the implementation of crop rotation and removal of disease residues. Promote the rotation of sunflowers with millet, millet, corn and other gramineous crops, and avoid continuous cropping with legumes and eggplants. The number of years of rotation is at least 3-5 years. Remove the straw as far as possible during the autumn harvest, dig out the stubble and turn it more than 10 cm deep. The second is chemical control. Include coating with 2.5% timely Le seed coating agent, the ratio of drug to seed is 1 ∶ 50 or soaking seeds with 50% carbendazim wettable powder for 4 hours; the control of blight type can be treated with Sukeling wettable powder 1 kg per mu mixed with appropriate amount of sand, combined with sowing and evenly scattered into the ditch of the planter At the initial stage of the disease in the field, the water was irrigated with 2-3 herbs every 7-10 days, at least twice. The prevention and control of rotten dish can be treated with 40% trimethoprim (sclerotia net) 800x ~ 1000 times, ethinolide or 50% carbendazim 500g 1000x, 50% methyl thiophanate (methyl thiophanate) 1000 times spray or carbendazim 1000 times after flowering for 7 days, 2 times in a row. In addition, planting disease-resistant varieties, planting with plastic film, changing equidistant to large and small ridges, adjusting sowing date, building disease-free seed base and implementing unified seed supply also have certain control effects.