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The main diseases of peanut
I. Bacterial wilt: The disease is a soil-borne bacterial disease. It is most likely to occur in July after a heavy rain storm. The disease occurred at the flowering stage and the initial stage of the peanuts. The diseased plants showed dehydration and wilting and died after 3 days. Control methods: l, selected resistance varieties. Such as Luhua 3, Yuhua 7 and so on. 2. Implement rotation. Such as peanuts and sweet potato rotation. 3, chemical control. With a 90% chlorinated bitter emulsion, dig 10 to 17 cm deep holes every 30 cm. Immediately after infusing 3 ml of liquid into each hole, the surface is covered with grasshoppers or plastic film, which is uncovered after 7 days. Second, root rot: The disease can occur throughout the growth period of peanuts. The susceptible plants were dwarf, and the leaves turned yellow from top to bottom and dried off. The main roots became black and rot until the whole plant died. The disease depends mainly on rain and field transmission. Seedling water in the field, low ground temperature, or too early or too deep sowing are all easy to cause the disease. Prevention methods: 1. Site-improvement of soil, addition of mature organic fertilizer, flood control, and field management. 2. Use 50% carbendazim WP to seed 0.3% of the seed amount. Third, black mold: The disease occurs mainly in the pre-growth period of peanuts. The bacteria first make the leaves black and rot, and then invade the roots and stems of the seedlings. When the damp is wet, the disease minister has a lot of molds to cover the stem base, and the stems and leaves lose water and wilt. death. Control methods: Same as the method of root rot control.