How does root-knot nematode disease occur? How to prevent? (1) Incidence pattern: Soybean root-knot nematodes live in winter with eggs in the soil. Infested soil is the main source of disease. In the field, it spreads further with water and farming. Root-knot nematodes prefer high temperature and good air permeability is good for its growth and reproduction. Root-knot nematodes are deeply distributed in the soil, up to 80 cm, but most are concentrated around the roots. In addition to harming soybeans, it can also harm peanuts, potatoes, and beans. Jute, kenaf, tobacco and other crops. (2) Control methods: 1 Implement rotation. It does not affect the crop rotation for 3 to 5 years or more 2 increase manure. Adding manure, especially chicken manure, can promote the growth of soybean, reduce the number of root-knot nematodes in the soil, and prevent disease and increase production. 3 chemical control, reference to soybean encased nematode disease. In addition, the effective phosphorus B of 250 grams per acre per mu is used. The method of use is to open the ditch and then apply drugs. After the cover soil is sown, avoid direct contact between the seed and the drug.
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