1. Timely tillage and weeding.
2. Reasonable irrigation. There are irrigation conditions in the potato flowering period, tuber expansion period of irrigation 3 to 4 times, pay attention to Shun ridge irrigation, flood irrigation to prevent flooding, so irrigation is not ridges, soil moisture content should be maintained at 60% to 80%. During the tuber formation period, water is applied in proper amount. In areas or seasons where there is more rainwater, drainage is timely and there should be no stagnant water in the fields.
3. Do a good job of pest control. Pay attention to the prevention and control of potato blight caused by potato early blight, late blight, ring rot, black shank, mosaic virus disease, leaf rolling disease, bacterial wilt and Rhizoctonia solani. (1) Late blight. The central diseased plant was found, all roots and tubers were dug out, brought out of the field and buried deeply, the diseased point was limed and disinfected, and the pesticides such as metalaxyl manganese zinc or glyoxal were sprayed within 50 meters around the diseased plant to control the isolation. Spray it once more in 10 days. From the end of July to August, it is necessary to universally control the use of 64% anti-disease WP 120g, 72% Kelu wettable powder or 58% metalaxyl WP or 80% Itachi Conformable wettable powder 100 grams, 50 to 60 kg of water evenly sprayed. According to rainfall and air humidity control every 7 to 10 days. Methylpropionate compound can be sprayed alternately (25% Ami- dida mu dosage 30-40 ml water 50 kg), and 72.2% formicin 800 times liquid sprayed the second time, the third time The amount of silver fertilizer used for spraying is 60-75 ml, 50 kg for water, or 53% for gold mine, 100-150 g of gram, and the spraying can be performed 3 times. (2) Bacterial diseases such as bacterial wilt can be sprayed with 50 to 70 kilograms of water for spraying prevention of 72% of agricultural streptomycin sulfate 20 million international units (equivalent to 20 grams); diseases such as ring rot, early blight, etc. With silver failli 60 ~ 75 ml, 50 ~ 70 kg of water, 25% Amisida 30 ~ 40 ml, spray control of 50 kg of water. (3) Insect pests. The control of aphids, whiteflies and other pests can be used in 25 mu of 5% anti-inflamy WP, 10 to 20 g of 10% imidacloprid wettable powder, or 10 to 25 ml of 20% fenvalerate EC in water. 50-70 kg spray, alternating use. Underground pests such as ground tigers, golden needles, cockroaches, crickets and other serious fields can be used in the loose soil with 1% trichlorfon 3 kg, fine soil 10 kg, sprinkled in furrows, or 0.38% matrine Emulsion 500 times, or 40% phoxim EC 1500 times spray.
4. timely harvest. The potato growth period is about 120 days. When the local stems and leaves are basically yellow and the tubers are easily separated, they are harvested on sunny days. If the late blight is infested but not too severe, it is best to cut off the disease and clean out the plot before harvest to prevent the potato block from getting infected. After harvesting, the potato chips can be properly exposed to make the wound healed and stored in the cellar or sold in time.
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