How to control Sclerotinia sclerotiorum of sunflower?

How to control Sclerotinia sclerotiorum of sunflower? Sclerotinia sclerotiorum of sunflower is caused by Sclerotinia sclerotiorum infection. In addition to harming sunflowers, it also harms cash crops such as soybean, rape, sesame, tobacco and so on. Sunflower can occur in all growth stages, especially after flowering. It is mainly harmful to stem and disk, and becomes two symptoms of stem rot and rotten disk. The cause of the disease: the pathogen overwintered with sclerotia on the remains of diseased plants or seeds. During sclerotia germination, mycelium is produced, which directly infects the stem base tissue of the host, or produces ascospores and ascospores, which infect stems, leaves and disk with wind, rain and insects. It is suitable for sclerotia germination when the temperature is 20 ℃ and the relative humidity is more than 80%. Control methods: 1. Agricultural measures to select disease-resistant varieties, such as Longkuiza 1, Ro-924; to remove the remains of diseased plants deeply buried or burned. 2. The seed treatment first sieves out the sclerotia between the seeds, and then uses 50% Sukeling wettable powder or 50% sclerotia net wettable powder to mix the seeds according to 0.3% of the seed weight. 3. Spray control: spray the lower part of the plant and the back of the disk twice with 50% sclerotia net wettable powder 500m 1000 times, or 50% carbendazim 1000 times, each time at an interval of 7 days. Click to get more sunflower planting techniques click to get more grain and oil crop planting techniques