The selection of varieties of autumn potatoes must use varieties with strong resistance to drought, high temperature drought, and short dormancy periods, such as “Dongnong 303”, “Buster 2” and “Buster 4”. The seeds of autumn potatoes should be selected from the small potatoes in spring potatoes. Seed potatoes are stored in low-temperature, ventilated areas in order to ease the degradation and ensure that the seedlings are neat and tidy in autumn. Since most varieties of spring potato autumn cultivation do not pass the dormancy period, they must manually break the dormancy period by soaking the seed potatoes in 10-15ppm concentration of 920 for 5-6 minutes before sowing. Allow to germinate and sow when dry. Timely sowing at the right time is the basis for the potato to obtain high quality and high yield. Potatoes are afraid of high temperature. Too early to sow prone to toxins, is not conducive to the whole seedlings; late sowing is susceptible to frost damage. The sowing date is controlled in the middle and early September. It is advisable to keep the daily average temperature below 30°C. Before the planting, we can use 48% of L. or Splendor 1000 times liquid spraying. Doing sowing side cover soil, after the cover soil with 90% Nai Nai 50-60 grams of water 100 kg uniform spray, control weeds. At the same time, cover straw or green grass moisturizing, rain, and soil temperature in order to facilitate emergence. The rational planting of autumn potatoes generally includes 5500-6000 holes in acres, 160-180 kilograms in acres, narrow lines in width, and 4025 cm in row spacing. When the seedling height is about 15 centimeters, soil is cultivated to increase soil permeability, which is beneficial to high yield. Application of base fertilizer Autumn potato growth period is short, to apply enough base fertilizer, generally Mushi perishable human pig fat about 1500 kg, 45% potassium sulfate compound fertilizer 50 kg or 50 kg of special compound fertilizer, after the trench ditch application cover soil. Leaf age 6-7 leaf stage, see the seedlings apply a good top dressing, so that when the drought is filled with horse racing water, rain and waterlogging. Late blight can be sprayed with 72% Kelu 700-800 times. China Agricultural Network Editor