Root diseases and pests mainly include cyst nematodiasis, root rot, root masculine fly, black velvet beetle, and ground tiger. Control methods: 1. Agronomic measures: 1 Do a good job of soybean variety replacement, avoid long-term planting of a single variety, and increase soybean's own resistance to diseases and insects. 2 Advocate mechanized seed selection to remove diseased grains, insect-eaten grains, weed seeds, and impurities to reduce the chance of pests and diseases. 3 sowing time, depending on the occurrence of pests and diseases in various places; adopt early sowing or postponed sowing methods to achieve the purpose of hiding and preventing pests. 4 Early ploughing, fine soil preparation, removal of diseased bodies as much as possible to reduce the probability of wintering of pests. 2. Chemical control: 1 Take 5% retinol (II) for the cyst nematode and root mass, and cooperate with the “three-ridge cultivation†sowing method with the fertilizer; it can also use seed coating agent, according to medicine: Kind of 1:75 ratio coating. 35% methylthiophosphorus, 35% ethylthiophosphorus, seed dressing 0.5%, of which the application of 5% Phosphate can also cure two leafhoppers, thrips, spider mites and other seedling pests. Soybean black velvet beetle and ground tiger can also apply the above method. 8 In the block where the root rot is severe, collect 50% of the mixture and apply 0.5% seed. (2) Mixing insecticides and fungicides can be used in mixed pest areas in the roots. The diseases and pests during the period of soybean replanting mainly include soybean downy mildew, soybean gray spot, and soybean borer. Prevention: 1. Agricultural control: Do a good job of cultivating cultivars during the growth period of soybeans, promote the formation of a large number of new roots, and destroy the living environment of pathogens. Strengthen the prediction and forecast of soybean diseases during the growth period of soybeans, determine the prevention and treatment period accurately and timely, and implement effective prevention and control; 2. Chemical control: (1) In the block where the downy mildew of soybeans is heavy, use 50% thiram for seed dressing at 0.5% of the seed amount. At the beginning of the disease, 75% chlorothalonil WP or 25% WP wettable powder can be sprayed. When water is sprayed at l00-125g/mu, spray is performed once every 7-10 days. Generally, it takes 2 times; 50% Carbendazim wettable powder spray was used for the diseased land; 3 Soya bean borer control was used; Dichlorvos fumigation or 5% Phosphate withdrawal method was used on well-clad plots. Specific methods: made of corn stalk poison sticks, every 6 ridge inserted l lines, every 6 meters far l l, 30 per acre, efficacy can be maintained for 7 days. Withdrawal of phosphate fertilizer every 6 ridges to apply a ridge. In the block where ridging is poor, it can be controlled by the pyrethroid pesticide spraying method; 4 insecticides and fungicides can be used in combination with pests and diseases. Portable Cable Reel,Garden Water Hose Reel,Retractable Garden Hose Reel,Wall Mounted Garden Hose Reel NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.hosereelqikai.com