What are the key field management techniques for autumn potatoes?

Autumn potato is one of the important late-autumn food crops. To achieve the goal of “making up for losses in the main spring season with the late autumn season,” localities have vigorously developed autumn potato production. At present, autumn potato planting has basically ended, and it has entered the field management stage. So what are the key points of autumn potato field management techniques? Follow the Tuliu.com editor below and take a look~

I. Check seedlings and fill gaps in time

Check seedlings and fill gaps in time. For missing hills and sparse seedlings caused by poor seed potato germination or rotten seed potatoes, methods such as thinning dense areas to fill sparse ones or raising reserve seedlings can be adopted, and gaps should be checked and filled in time to ensure a full stand.

II. Timely intertillage and weeding

Topdressing: Because autumn has short sunshine hours, 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 the stand. To promote early and rapid growth of potato seedlings, weeds should be removed in time after full emergence, combined with ridging and soil hilling. According to seedling condition and base fertilizer application, apply 2-3 kg of urea per mu with clear manure water as a seedling-promoting fertilizer once; about 30 days after emergence, spray 50 kg of 0.35% potassium dihydrogen phosphate solution per mu twice, with an interval of 7-10 days each time, and build beds and hill up soil. Autumn potatoes covered with rice straw do not need intertillage and weeding during the growing period.

III. Drought resistance and drainage

Before and after autumn potato emergence, timely drought resistance and drainage must be done well to promote and protect the stand. In 2006, the sowing period of autumn potatoes in our province was relatively dry, so after sowing, attention should be paid to watering to keep the rows and ridges moist until emergence; for individual fields with high humidity, deep ditches and high beds must be used to remove moisture. After emergence, if there is no drought, there is no need to water; if continuous rain occurs, clear the ditches and drain water in time to prevent waterlogging and remove moisture.

IV. Pest and disease control

Pay attention to preventing and controlling bacterial wilt. Diseased plants found should be pulled out and destroyed in time. Late blight has a great impact on autumn potato yield, so observation must be strengthened and timely control carried out. At sowing or at the seedling stage, systemic pesticides such as metalaxyl (Ridomil) or mancozeb can be used once together with 2 kg of activated carbon per mu (applied to the root soil) for control; in the middle and later stages, when central diseased plants are found in the field, they should be immediately pulled out or diseased leaves removed and destroyed, and 25% metalaxyl-mancozeb 600-fold solution or 72% Kelu 700-800-fold solution, etc., can be sprayed on plants for control, once every 7-10 days, spraying 2-3 times continuously. At the same time, inspection for aphids should be strengthened. If they occur, promptly spray with pirimicarb 1000-3000-fold solution for control.

V. Timely harvest

Generally, harvest in time before the first frost. Under normal circumstances, harvest can be done in mid-to-late December. For autumn potatoes covered with rice straw, simply turn over the rice straw and pick up the tubers on the soil surface. Farmers with available labor can, according to market prices or needs, adopt a staged harvesting method, that is, gently push aside the rice straw, harvest the tubers that have already grown large, then cover the rice straw again to let the small tubers continue growing. In this way, they can be marketed in time and income can be increased.

Alright, the above is the autumn potato field management technique brought to you by the Tuliu.com editor. Friends who like it can follow Tuliu.com to get more information. See you next time.