Soybean root pests and diseases mainly include cyst nematodiasis, root rot, root fly fly, black velvet beetles, and ground tigers. The prevention and control methods are as follows:
Agronomic measures: Do a good job in replacing soybean varieties, avoiding long-term planting of a single variety, improving soybean's own resistance to diseases and insects, and advocating mechanized seed selection to remove diseased grains, insect-eaten grains, weed seeds, and impurities, and reduce pest and aphid infestation. Opportunity; timely sowing, based on the occurrence of pests and diseases in various regions; adopting early sowing or postponed sowing methods to achieve the purpose of hiding and preventing pests; early ploughing, fine soil preparation, as far as possible to remove the diseased body, reduce the chance of pests overwintering.
Chemical control 5% phorate (II) is applied to the cyst nematode and root masses. The â€œthree-ridge cultivationâ€ seeding method is used with the seed fertilizer; the seed coating agent can also be used, and the ratio of drug is 1:75. 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. The above method can also be applied to soybean black cashew beetles and ground tigers; in the heavy-rooted rot, the use of 50% multi-fu mixture, seed dressing 0.5%; in the root pests mixed area, can take pesticides , fungicides mixed seed dressing.
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