Symptoms: Peanuts are most susceptible to the disease at the early flowering stage. At the beginning of the diseased plant, the first and second leaves of the main stem tip were wilted and wilted. The leaves were delayed in the morning and the leaves were folded ahead of time in the afternoon. After l-2 days, the whole plant or one leaf of the diseased plant was withered from top to bottom, dark in color, green and green, and later diseased leaves became brown and dry. Diseased plants are easy to pull up, their main root tips, stalks, and fruit pods are dark brown and rot. The nodules are dark green. The vascular bundles of the diseased stems were dark brown in color, and the white mucus overflowed under the moisturizing of the cross section.
Control methods:
1. Agricultural control: Select high-yield, disease-resistant varieties and make a reasonable rotation. There is a place where water is available, and the practice of dry and dry crop rotation is effective. The dry land can be used for 3-5 year rotations with melons and grass crops to avoid continuous cropping with solanaceae, leguminous, sesame and other crops. Peanuts in the drylands, for short-term irrigation before sowing, can cause a large number of deaths of the bacteria.
The use of formula fertilization techniques, Shizu base fertilizer, application of phosphorus, potassium fertilizer, suitable for nitrogen fertilizer, spraying Tianda 2116, promote steady long-early hair peanuts. Lime can be applied to acidic soils to reduce soil acidity and reduce disease occurrence.
2. (1) Seed dressing: before sowing, Tianda 2116 dip and seed dressing special type 50 grams, 750 grams of water mixed peanuts 20 kg, do not boring species. (2) Spraying: After the peanuts are radiated, the mu is sprayed with 72% of agricultural streptomycin 4000 times and 10% of the world's high 2500 times of spray to increase the efficacy. It can be mixed with Tianda 2116 Zhuangmiaoling 600 times liquid. Mixed silicone liquid 6000 spray, better results.
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