How to prevent potato virus disease
Potato virus disease is a serious disease of the potato. The main reason is that the planting of the poisoned seed potato has accelerated the propagation and transmission of locusts in the high-temperature climate, and the extensive cultivation and management, lack of fertilizer, and lack of water will aggravate the disease. After onset, the plants were deformed and dwarfed, which reduced the yield. As a result of the virus disease, the potatoes were degraded. After infestation of potato, the main manifestations are wrinkled mosaic disease and leaf rolling disease. Shrinkage mosaic: Dark green and light green mottled leaves appear on the leaves, the leaves shrink, the tip of the leaf bends downward, shrinks, and the whole plant dwarfs. Curl leaf disease: leaf margin curling up, severe when cylindrical, diseased leaf is slightly smaller than the healthy leaf, lighter leaf color, sometimes the back of the leaf is red or purple. In addition to establishing a disease-free field, the method of prevention and control should be kept away from potato production fields, and the use of virus-free seed potatoes and planting of virus-free seed potatoes should be such that: 1. Strengthen cultivation and management Increase the row spacing, narrow the plant spacing, high ridges and furrows, apply sufficient basic fertilizers, increase phosphorus and potash fertilizers, reasonably apply water, remove diseased plants in time, and reduce the incidence. 2. Tackling disease prevention and control Potatoes are sprayed immediately after they emerge, preventing and controlling locust transmission. 3. Chemical control with 1.5% of plant disease Ling 1000 times liquid plus 20% virus a600 times spray, spray once every 7 days, even spray 3 to 4 times, the disease prevention effect is better. Bulk Freeze Dried Coffee,Freeze Dried Coffee Brands,Freeze Dried Soluble Coffee,Freeze Dried Instant Coffee Brands Yunnan New Biology Culture Co,.Ltd , https://www.lvsancoffee.com