Potato pre-emergence management technology

The summer harvest potato is going to break the soil, and the expert of Hubei Agricultural Technology Extension Station reminds the majority of growers to catch up with the spring harvest.

First, timely membrane breaking and seedlings. It is necessary to regularly check the emergence of the film covered potato, so that the seedlings are broken in time, and the seedlings are broken at the emergence site to take out the seedlings, and the membrane holes are sealed with wet soil.

Second, early application of seedlings and potato fertilizer. In the seedling stage, 15 kg of urea per acre, or 200 kg of manure and manure, or 25 kg of ammonium bicarbonate plus 5-8 kg of potassium sulphate for water application; in the bud period, 10-15 kg of urea per acre But pay attention to seeing the fertilization of the seedlings.

Third, early soil, high ridge. In the seedling stage, a cultivating and cultivating soil was carried out in combination with topdressing; when the bud fertilizer was applied, the second cultivating and cultivating soil was carried out, and the ridge height reached 20 cm or more.

Fourth, timely drought resistance. For dry fields, water should be poured in time, and the soil should be drained immediately after the soil is wet; when there is more rain, the ditch should be cleared in time.

Fifth, to prevent low temperature freezing damage. Adding hot fertilizers such as grass ash and fire-burning soil at the time of sowing, or taking measures such as irrigation, fumigation and grass cover on potato plants before the cold wave, to enhance the cold resistance of the plants.

Sixth, do a good job of regulation and control. When the plant grows too prosperously, in the bud stage, choose the sunny day morning dew disappears or after 2 pm, use 15% paclobutrazol 35g plus water 60kg per acre to spray evenly. If there is still a long trend, it can be sprayed once after spraying one week.

7. Strengthen pest and disease prevention and control.

Late blight: After the average temperature of the seedlings reaches 15 °C and there are more than 3 consecutive days of rain, use 70% mancozeb WP, 175~225g per acre; or 70% Antaisheng, per acre The secondary dose is 150 to 200 grams, etc. for prevention. When the diseased plants in the late blight center were found in the field, 60.75 ml of silver granules per acre was used, or sprayed with 72% gram of dew. Repeatedly every 7 to 10 days when the disease is severe, 4 to 5 times in a row.

Underground pests: First, use Loess granules mixed with base fertilizer to spread in fertilization ditch; second, spray with 90% crystal trichlorfon 800-1000 times solution or 50% phoxim 2000 times solution for the first time. Bao Miao.

Aphids: can be evenly sprayed with 50% anti-Pu Wei WP 2000-3000 times or 10% imidacloprid WP 2000 times.