Paclobutrazol, a triazole type broad-spectrum and less toxic plant growth regulator, is an inhibitor of endogenous gibberellin synthesis. It can be absorbed and utilized by plants through crop roots, stems and leaves. After the root of the plant is absorbed, it will be transported to the upper part of the crop through the xylem, and it will move slowly after the leaf is absorbed. Its mechanism is to inhibit the biosynthesis of kaurene, kaurenol and kaurenal. Generally, Paclobutrazol has the following physiological functions: it can effectively control the growth of new shoots or plants, inhibit stem elongation and dwarf crops, promote the lateral bud germination of crops, increase the number of flower buds, increase the fruit setting rate, increase the chlorophyll content and soluble egg white content in leaves, enhance photosynthetic rate, reduce stomatal conductance and transpiration rate, Promote the development of crop roots, enhance the cold resistance of plants, improve the calcium content of fruits, and avoid and reduce storage diseases; However, when widely used, it can cause leaf shrinkage, resulting in smaller fruit, shorter and thicker fruit stalk, dark color and so on. Paclobutrazol takes a long time to control its efficacy. When it is used for flowers, such as daffodils, chrysanthemums, Osmanthus fragrans, lilies, azalea, camellia, poinsettia, bunch of red, bowl lotus and Populus tomentosa, it can promote its plant dwarfing, compact plant type and greatly improve its ornamental value. The value of Paclobutrazol in agricultural production is mainly reflected in its control effect on crop growth. The agent can delay plant growth, inhibit stem elongation, shorten internodes, promote plant tillering, promote flower bud differentiation, increase plant stress resistance and increase yield. Paclobutrazol has a very significant effect and strong applicability on rice, wheat, cotton, peanut, soybean, fruit trees and other crops. Paclobutrazol can improve the seed setting rate of soybean and is an indispensable part in the growth of soybean. Paclobutrazol is one of plant growth regulators. Many plants use plant growth regulators to control plant height, prevent overgrowth and lodging, regulate metabolism, and should be an effective measure to reduce soybean flower and pod falling, which has an obvious effect on yield increase.
Paclobutrazol: it can control the height of soybean plant, shorten the length of internode, increase the number of branches, pods and seeds per plant, improve the seed setting rate, promote the formation of top pod, and increase the yield by more than 12%. The suitable concentration is 0.01% – 0.02%. Spring soybean should be low and summer soybean should be slightly high; Those with general growth should be low, and those with good growth should be slightly high. 50-100g of 15% Paclobutrazol wettable powder per mu, diluted with 75kg of water, evenly spray on the front and back of leaves from about 5 days before flowering to about 7 days after flowering, without re spraying or missing spraying. Those with good growth should be used early, and those with normal growth should be used late.
Paclobutrazol is a plant growth regulator, which plays an effective role by inhibiting the synthesis of gibberellin in plants. Paclobutrazol used in wheat and rice seedling stage can make the seedlings short, strong and tillering. Paclobutrazol has a long effective period, and can still play a role from seed dressing to jointing stage of rice and wheat. At jointing stage, it also inhibits the formation of gibberellin in rice and wheat, inhibits the elongation of internode cells, makes the internodes at the base of rice and wheat thick and short, and enhances the lodging resistance of plants. The dosage of Paclobutrazol mixed with wheat seed should not be too large, otherwise it will affect the seed germination and seedling growth, delay the performance of seedling stage, reduce the emergence rate, slow seedling growth, etc.
Post time: Dec-01-2021