What diseases should be controlled when planting soybeans?

What diseases should be controlled when planting soybeans? Please introduce the diseases that need to be controlled in planting soybean: 1. Soybean root rot: the disease can occur and cause damage throughout the growth period of soybean, with a yield reduction of 25-75% or more. The protein content of the damaged seeds decreased obviously, and the main symptom was that the dark brown disease spot appeared at the base of the stem and spread upward to the lower lateral branches, which made the pith of the diseased stem brown, the base of petiole constricted and the leaves drooping, but did not fall off. The main application of chemical control is 58% Ruidu Manganese Zinc or 72% Kelu wettable powder, the dosage is 0.3% 0.4% seed dressing. two。 Soybean Sclerotinia sclerotiorum: soybean Sclerotinia sclerotiorum mainly infected the stem, which began to occur in late July. At the initial stage of infection, there were brown spots on the stems, then white cotton-like mycelia and white particles, and then black particles (sclerotia). The stem of the diseased plant showed a black cylindrical mouse fecal sclerotia, and the diseased plant was grayish white after death. Spray 50% sulfamethoxazole wettable powder 1000 times or 1000 times of Sclerotinia sclerotiorum or 50% methyl topiramate. 3. Soybean gray spot: also known as spot disease, generally began to occur in the first and middle of June, and entered the peak period in mid-July. The disease of pods began from the tender pod stage, the peak period was in the grain-filling stage, and the disease was serious in high temperature and rainy years from July to August. The main harm to the leaves, when the disease is serious, almost all the leaves are covered with disease spots, causing the leaves to fall off prematurely, reducing the yield by 20-30%, and reducing the weight of 100 grains and the quality. Chemical control: in addition to sowing seeds with 70% dimethazone wettable powder or 50% thiram wettable powder according to 0.3% of the seed amount, 40% carbendazim glue suspension 1.5 kg per hectare and 450 kg water spray. Click to get more soybean planting technology click to get more grain and oil crop planting technology