In the potato bud stage to the flowering stage, the foliar spray of 60-120 mg/L of CHZ (lower limit at bud stage) can inhibit the growth of the above-ground part of the plant, increase the yield, and increase the size of the large and medium tubers. proportion.
Chlorothrin is used in the plant budding stage to early flowering stage, using 2,000-2,500 mg/L of Chlorella Chloride solution to spray, 50 liters/acre, which can make the aboveground part grow robust, avoid leggy, make tubers form earlier and increase. The ratio of large tubers increases yield.
Uniconazole with 30 ~ 70 mg / liter uniconazole solution, in the potato flowering period (ie, when the potato block expansion) foliar spray, can make the stem vines internode shortening, dark green leaves, ground growth retarded, underground potato block Growth speeds up and increases the number of tubers.
Paclobutrazol is sprayed at a height of 25-30 cm in potato with 150-200 mg/L paclobutrazol solution, with 15% wettable powder 24 to 32 g per mu, or 14.4 to 19.2 ml of 25% EC, with water added 40 Lit, spray evenly onto the leaves of the plants with a sprayer to control stems and leaves. From the late growth stage of potato plants to the tuber stage, 100 mg/L of paclobutrazol solution was sprayed at an amount of 50 liters/mu, which can promote tuber hypertrophy, increase the proportion of large and medium-sized potatoes, and increase yield. Before use, attention should be paid to the choice of concentration, and the dosage should not be too large, so as not to affect the growth of post-plant crops.
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