Three key techniques for field management of autumn potatoes

Doing a good job in autumn and winter field management is the key technique for obtaining a high yield of autumn potatoes, and the specific measures are as follows:

1. Timely intertillage and weeding, and topdressing according to the seedlings: because autumn has short sunshine, which is suitable for tuber growth, the plants set tubers early and are not prone to excessive vegetative growth, so management should focus on promoting growth. When 60-70% of the potatoes have emerged, apply 2.5-3 kg of urea per mu, mixed with 1600-2000 kg of water and fertilizer, by hole application; when they grow to 30-40 cm, apply 500 kg of plant ash per mu, mixed with 40-50 kg of human and livestock urine, stir well, then apply by hole application, and build up the beds and earth up the soil to promote early tillering and rapid growth.

2. Clear the drainage ditches well and reduce field humidity: after sowing, water continuously to keep the rows and ridges moist until emergence. When the temperature drops later, reduce irrigation, clear the drainage and moisture-removal ditches, and gradually thicken the earth-up soil to protect against cold and protect the tubers.

3. Apply pesticides in a timely manner to well control potato late blight and aphids: the most effective agent for controlling late blight is 25% ridomil manganese zinc at 600 times dilution, or 72% Kelu at 700-800 times dilution for spraying; the effective agent for controlling aphids should be pirimicarb at 2000-3000 times dilution for spraying