Key points of Field Management of Potato

Potato is a kind of grain and vegetable crop. In order to achieve its high yield and high efficiency, we must do the following in field management:

The main results are as follows: 1. in the early stage of weeding seedlings, the main measures should be to promote root and stolon. From emergence to the present 7-8 true leaves, the seedlings grow slowly, the temperature is low, and the water demand is low, so they should be ploughed more, irrigated less or not, in order to increase the ground temperature, promote good rooting, and grow stolons quickly. In case of drought, one can be watered after emergence, but ploughed in time after watering to keep the soil loose, which is conducive to the promotion of strong seedlings. After the stolon began to form in the later stage of the seedling, the aboveground growth accelerated. In order to promote the stem and leaf growth and form a larger leaf area, it should be properly watered, and according to the seedling growth situation, the available N, P, K fertilizer should be applied, and the soil should be ploughed and cultivated, and the culture layer should be thickened gradually.

2. Fertilizer and water management before potato budding, watering should be controlled properly, and squatting seedlings should be irrigated once during budding, so as to control the overgrowth of aboveground parts and promote tuber hypertrophy. Squatting seedlings combined with ploughing, continue to cultivate the soil. After squatting seedlings, keep the soil moist, increase the application of P, K fertilizer, and cooperate with N fertilizer to fully meet the large demand for fertilizer and water for tuber expansion.

Third, remove the flower Cao to save nutrients when the potato shows buds, it should be removed in time and concentrate nutrients for tuber growth.

Fourth, combined with spraying foliar fertilizer in the late growth stage of potato, the root absorption capacity decreased, which could not meet the needs of plant growth. For this reason, foliar fertilizer can be used to make up for the deficiency. The specific approach is: about 15 days before harvest, spraying 0.5% urea, 0.3% potassium dihydrogen phosphate and other foliar fertilizer, the effect of increasing production is significant.

Fifth, the application of chemical control technology in the growth period in order to prevent the growth of aboveground, can be sprayed with paclobutrazol of 100ppm or Zhuangfengan of 50ppm-100ppm, 50 kg aqueous solution per mu.

6. the main diseases and insect pests of potato are virus disease, early blight, late blight, potato Gill beetle, potato tuber moth, potato ladybug and so on.

Prevention and control measures: the virus disease can be sprayed with 1.5% Zhixianling emulsion 1000 times or virus A wettable powder 500x liquid; early blight and late blight can be sprayed with 64% antidote alum wettable powder solution, 1azuza 1200 Bordeaux solution, once every 7 days-10 days, 2-3 times successively. During the occurrence period, potato Gill beetle larvae were killed with 1000 times of methyl isophosphates and 50% phoxim, and 1500 times of 10% chrysanthemum and horse EC were used to control the occurrence of potato tuber moths and potato ladybugs. (source: gourmet website)