How to prevent and control sunflower sclerotinia? A detailed guide to practical methods
To prevent and control sunflower sclerotinia, the first thing to pay attention to is practicing crop rotation and removing diseased plant residues. Sunflower should be rotated with grass-family crops such as broomcorn millet, foxtail millet and corn, and continuous cropping with legumes and solanaceous crops should be avoided. The rotation period should be at least 3 to 5 years. At autumn harvest, remove the stalks as much as possible, dig out the root stubble and plow deeper than 10 cm. Next is...
To prevent and control sunflower sclerotinia, the first thing to pay attention to is practicing crop rotation and removing diseased plant residues. Sunflower should be rotated with grass-family crops such as broomcorn millet, foxtail millet and corn, and continuous cropping with legumes and solanaceous crops should be avoided. The rotation period should be at least 3 to 5 years. At autumn harvest, remove the stalks as much as possible, dig out the root stubble and plow deeper than 10 cm.
The second is chemical control. This includes seed coating with 2.5% Shishile seed coating agent at a medicine-to-seed ratio of 1:50, or soaking seeds in a 500-fold solution of 50% carbendazim wettable powder for 4 hours; to control the damping-off type, 1 kg per mu of Procymidone wettable powder can be mixed with an appropriate amount of sandy soil and evenly scattered into the furrow opened by the seeder during sowing; in the early stage of field disease, Procymidone or dimethachlon can be diluted with water and used to drench the roots of each plant, with 2 to 3 liang of solution per hole, applied once every 7 to 10 days, at least twice. To control head rot, a 800-fold to 1000-fold solution of 40% wenkuli (dimethachlon), vinclozolin or a 500-fold to 1000-fold solution of 50% Procymidone, a 1000-fold solution of 50% thiophanate-methyl (thiophanate-methyl), or a 500-fold solution of carbendazim can be sprayed after full bloom at 7-day intervals, 2 to 3 times in succession.
In addition, planting disease-resistant varieties, using plastic film mulching, changing equidistant planting to wide and narrow row planting, adjusting the sowing date, establishing disease-free seed production bases, and implementing unified seed supply also have a certain preventive and control effect.