Apple Shoot Growth Retardation
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隐藏域元素占位
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Product Details
Application of Regulators for Apple Shoot Growth Retardation
After apple fruit set, when the new shoots grow to 2.5~7 cm, spray the whole plant or the crown with 100~200 mg/L liquid medicine, which can slow down the growth of spring shoots and reduce the number of long and leggy branches; autumn shoots of apples in autumn At the beginning of germination, spraying 200-400 mg/L prohexadione calcium on the whole plant can effectively slow down the growth of autumn shoots, promote the accumulation of nutrients to the fruit, improve the quality of the fruit, and increase the yield.Prohexadione calcium has a short half-life and rapid degradation after use, and will not cause phytotoxicity on apples after standardized and rational use. At the same time, it has a good preventive effect on diseases caused by bacteria and fungi such as fire blight.
Paclobutrazol (soil application)
After apples are picked, 25 g of 15% paclobutrazol wettable powder is applied in furrows around the rhizosphere of each tree, which can control the length of shoots and increase the amount of short branches, thereby enhancing photosynthesis and improving fruit setting rate.In the second year after application of paclobutrazol, the length of shoots decreased by 10.7%~46.5%, and the yield was increased by 31.8%~202.6%. The leaves are thickened and the crown is dwarfed and compact.It should be noted that the sensitivity of apple varieties to paclobutrazol is different, and the dosage should be determined on the basis of local experiments; the use of paclobutrazol for many years in apples should be determined according to the growth of the tree, so as to prevent excessive dosage and affect apple yield.
Paclobutrazol (leaf spray)
In early May, the concentration of 750~1000 mg/L is the best, and the inhibitory effect is obvious in the same year, and the effect can last for 3 years. The inhibitory effect of foliar spray is weaker than that of soil application.The application of paclobutrazol can change the branch composition of young trees. With the increase of concentration and dosage, the number and proportion of medium and short branches increase in turn, and the proportion of long branches decreases, which can significantly increase the number of flower buds formed in young trees.
Paclobutrazol (apply dry)
20~30d after cultivation, coating the trunk with 1000 mg/L liquid medicine can slow down the growth of new shoots, dwarf the plants, increase the number of flowers, improve the fruit set rate and yield, the fruit size is uniform, the coloring is good, the fruit quality is improved, and the root growth is promoted. development, mitigation of disease and fruit dehiscence loss.
(Note: The sensitivity of apple varieties to paclobutrazol is different, and the dosage should be determined on the basis of local experiments. The use of paclobutrazol for many years in apples should be determined according to the growth of the tree, so as to prevent excessive dosage and affect apple yield.)
Applicable Crop
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