Film spring potato management

After May, the spring potato will gradually enter the tuber expansion period. At this stage, the demand for water and fertilizer is large, which is also the high incidence period of pests and diseases. In the later management, we should focus on the following three points:

I. Removal of membrane soil

When the stalks and leaves of the aboveground mulch potatoes reach a height of about 30 cm in the early spring, the tubers begin to swell before and after the buds appear, and when the outside temperature is stable at around 25 °C, the mulch covered on the ground should be removed in time. After removing the mulch, it is necessary to remove the weeds between the ridges in time and cultivate the soil twice at the roots of the potatoes. The cultivation of potatoes can increase the yield of potatoes and prevent the occurrence of potato tuber green skin disease.

Second, watering and fertilizing

Potato tubers need ample water and fertilizer supply when they are swollen. When the tubers have the size of walnuts, they can increase the watering and topdressing. Potatoes belong to the potassium-type crops. The demand for potash fertilizer is relatively large. When watering, 20 kg of nitrogen and potassium fertilizers are applied, and the topdressing is carried out once every 10 days. When encountering continuous dry weather, pay attention to timely watering to prevent soil drought from affecting tuber swelling.

Third, the control of pests

Potatoes enter the late growth stage, and the main pests are aphids and mites. The mites suck on the juice of the potato leaves, and it is also very easy to spread the potato virus disease, which obviously affects the yield. It can be sprayed with 10% imidacloprid 800 times solution, sprayed once every 7 days, and sprayed twice. Earthworms are a major underground pest that affects potato yield. They bite potato tubers, causing a decline in yield, poor commercial properties, and affecting planting income. The phoxim is used to irrigate the roots, and the dosage of 1 to 1.5 kilograms per acre is combined with watering and rooting before and after the evening to achieve obvious control effects.

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