First, timely earth-cultivation There is currently a widespread phenomenon of thin soil and narrow ridges, which can easily produce sweet potatoes and affect commodity quality. It must be combined with cultivator soil once, thickness 2-3 cm, and cover the entire mulch to prevent the phenomenon of sweet potato.
Second, the top dressing fertilizer on potato plants grow weak, yellow leaves of the plot to be timely spray fertilizer, can also be used 0.3% urea or potassium dihydrogen phosphate spray, the concentration should not be too large, so as not to burn the leaves of plants.
Third, the control of chiefs through the field survey, individual plots have a phenomenon of leggy, plant growth is particularly strong. It is timely to spray “paclobutrazol†to regulate and promote the conversion from vegetative growth to reproductive growth. The buds that appear are removed in time to avoid consumption of nutrients.
4. Water Management Potatoes should maintain the soil moisture during the seedling stage until the budding stage to facilitate the vegetative growth of the plants. Generally, when the seedlings are in seedling stage, water can be poured once, especially during budding period, flowering period, and potato harvesting period. Water is poured in each of the three periods depending on weather conditions. One is to increase bran, and the other is to reduce temperature, in order to facilitate the formation of tubers, expansion, water should be poured along furrows, it is best not to diffuse over the ridge roof to prevent soil surface hardening, stop watering 7 days before harvest.
V. 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% Rhizoctonia WP 1000 times liquid, once a week, 2-3 times can control the disease development. 2, pests. The pests that injure potatoes mainly include 28 ladybugs and aphids. The control of 28 ladybugs can be used in the early larval eggs hatching with 20% deltamethrin EC 1000-1500 times, spray every 6-8 days, even spray 2-3 times; aphids can be used 5% Acetylè„’ Emulsion 1000-1500 times or 5% imidacloprid 1000-1500 times, spray once every 7 days, spray 2-3 times.
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