Spraying paclobutrazol on potato is beneficial to crop growth regulation.

Paclobutrazol is a new and efficient plant growth regulator, which is suitable for many kinds of plants. The practice shows that the effect of paclobutrazol on potato is very significant. 1. Application effect 1. Dwarfing plants: after spraying paclobutrazol, the plant height of potato decreased by 1 × 2, the Internode shortened by 1 × 3, the stem became thicker, the leaves became smaller and thicker, the chlorophyll content increased, and the photosynthesis efficiency increased, thus promoting the transfer of nutrients to tubers and promoting the growth and development of tubers. 2. Weed inhibition: paclobutrazol is a plant growth regulator, but it also has the functions of weed control, sterilization and disease control. After the potato was sprayed with paclobutrazol, the weeds such as paspalum grass and wisps in the field were basically restrained, and the common disease of potato-late blight was also greatly reduced, so as to improve the quality of potato. 3. Reduce the proportion of small potatoes: after spraying paclobutrazol, the growth of stems and leaves can be controlled quickly, so that the formation period of tubers can be advanced by 5 seconds and 7 days, thus reducing the proportion of small potatoes by about 15% and increasing the proportion of large and medium potatoes, so as to achieve the purpose of increasing production. The results showed that after spraying paclobutrazol, the potato could produce about 1550 kg of fresh potato per mu, which was about 310kg higher than that of the control. Second, the use of technical potato into the full potato period, 15% paclobutrazol wettable powder 50 grams per mu, 60ml 70kg of water, evenly sprayed on the leaves of potatoes. It is worth noting that potato spraying paclobutrazol should be timely and uniform, the concentration should not be too high or too low, and should not be mixed with alkaline substances.