Control measures of soybean diseases

Soybean Sclerotinia sclerotiorum mainly infects stems, and most of them begin to occur in late July. At the initial stage of infection, there were brown disease spots on the stems, and then there were white cotton-like mycelia and white particles on the disease spots, and then turned black particles (sclerotia). In the longitudinal section of the stem of the diseased plant, the black cylindrical mouse fecal sclerotia could be seen, and the diseased plant was grayish white after death. Chemical control: spray with 1000 times of 50% sulfamethoxazole wettable powder, or 1000 times of 50% Sclerotinol, or 50% methyl topiramate. 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 grain filling stage was the peak stage, and the disease was serious from July to August with high temperature and heavy rain. It mainly harms the leaves. When the disease is serious, almost all the leaves are covered with disease spots, causing the leaves to fall off prematurely. After the damage, the yield can be reduced by 20% and 30%, and the quality of soybeans will be reduced. Chemical control: in addition to sowing with 70% dimethazone wettable powder or 50% thiram wettable powder according to 0.3% of the seed amount, but also in the soybean flower and pod stage, 40% carbendazim glue 100 grams per mu, 30 kg of water spray control.