The disease of potato is mainly late blight, which is the main disease of potato. Leaves, stems and potato tubers can be damaged. When dry, the lesions become brown and brittle, and there is no mold layer. The epidemic of late blight is closely related to climatic conditions and fertility stages. After the potato is frozen and the temperature is suitable, the disease can be spread throughout the field within 10 days, and the loss is serious. The control measures are that if plants with late blight are found in the growing season, they should be sprayed and controlled in time. 50% of the mancozeb WP can be used 1000 times or 25% of the toxic WP WP 800 times. Once every 7 days, spray 3~4 times.
The insect pest of potato is mainly aphid, which is one of the main pests of potato damage. It has strong fertility and is mainly harmful to leaves and shoots. It is also the main carrier for transmitting viral diseases. There are also 28-star ladybugs and underground pests. The main control methods are: aphid control with 40% omethoate 800 times solution or 10% sputum once (net wormwood) wettable powder 1000 times for prevention; 28-star ladybug Using 80% trichlorfon 500 times liquid or dimethoate 1000 times liquid spray control, it is found that adults begin to control; underground pests are mainly cockroaches, cockroaches and ground tigers, with 80% trichlorfon WP 500g and water soluble and Stir-fried cotton cake or vegetable cake or wheat bran 20 kg mix well as poison bait. Sprinkle it on the ground near the seedling root in the evening, or use phoxim granules 812 powder, and apply it to the soil for control.
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