First, field management 1, timely earth training. At present, farmers often have thin soil and narrow ridges. They are prone to produce sweet potatoes and affect the commercial nature. They must combine cultivator large-scale cultivation soil once, be 2 to 3 cm thick, and cover the entire mulch to prevent the phenomenon of sweet potato. 2, the top dressing. For the weak growing potato plants, the yellow-leafed plots should be sprayed with foliar fertilizer in time, and 0.3% urea or potassium dihydrogen phosphate spray can also be used. The concentration should not be too large to avoid burned plant leaves. 3, control leggy. According to the field investigation, there are leggy phenomenon on individual plots, and the plants are particularly prosperous. It is necessary to timely spray “paclobutrazol†to regulate and promote vegetative growth to reproductive growth and transformation. The buds that appear are removed in time to avoid consumption of nutrients. 4, water management. From the seedling stage to the budding stage, the potato should keep the soil moist to facilitate the vegetative growth of the plants. Generally, the seedling stage can be poured with water once in the seedling stage, especially during budding period, flowering period and potato growth period. Water needs, in each of these three periods, depending on the weather conditions, water is poured one time. One is to increase the temperature, and the other is to reduce the temperature so as to facilitate the formation and expansion of the tubers. The water should be poured along the furrows, and it is best not to diffuse over the roof to prevent The soil surface is hardened and watering is stopped 7 days before harvest. Second, pest control 1, disease. The most serious ones are the early and late blights. Found that the central diseased plant was sprayed with 25% Rhizoctonia WP 800 times solution or 72.2% pomegranate 650-800 times solution or 72% DuPont Kelu 700-800 times solution or 25% Rhizoctonillus WP 1000 times liquid once a week, 2 or 3 times to control the development of the disease. 2, pests. The pests that injure potatoes mainly include 28 ladybugs, locusts, and other insects. The ladybugs of the 28th ladybird can use 20% deltamethrin EC at the initial stage of larval egg hatching, and spray 1000 to 1500 times every 6 to 8 days. Times, even spray 2 to 3 times, the locust can be used 5% acetamiprid EC 1000 ~ 1500 times liquid, spray once every 7 days, and even spray 2 or 3 times. The above is the management technical point of the period of potato flowering and potatoes introduced by agricultural technicians. In addition to doing topdressing, it is also necessary to control plant growth.
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