A Detailed Explanation of the Effects and Usage Methods of Paclobutrazol
What are the effects of paclobutrazol? How is paclobutrazol best used? We ask experienced netizens to help explain. Paclobutrazol can be used in crops such as rice, wheat, peanuts, fruit trees, tobacco, rapeseed, and soybeans, but quite a few netizens are not very clear about the specific effects and detailed usage methods of paclobutrazol, ...
What are the effects of paclobutrazol? How is paclobutrazol best used? We ask experienced netizens to help explainPaclobutrazol can be used in crops such as rice, wheat, peanuts, fruit trees, tobacco, rapeseed, and soybeans, but quite a few netizens are not very clear about the specific effects and detailed usage methods of paclobutrazol, so Zhongdi Network has compiled the effects and usage methods of paclobutrazol, listed in detail below for netizens' reference.
Effects of paclobutrazol:
Paclobutrazol is a triazole plant growth regulator and an inhibitor of gibberellin synthesis. It mainly inhibits the biosynthesis of gibberellin in plants, slows down plant growth, controls the elongation of crop stems, shortens crop internodes, promotes plant tillering, can promote plant flower bud differentiation, increases plant stress resistance, and improves yield, among other effects.
Usage methods of paclobutrazol:
I. Methods of using paclobutrazol on rice:
1. At the one-leaf-one-heart stage of rice seedlings, use 100 kg per mu of a 0.0003% paclobutrazol aqueous solution to spray the rice seedlings evenly, which can effectively control seedling height and cultivate rice seedlings with many tillers and strong rooting ability.
2. After rice transplanting, at the rice panicle differentiation stage, use 180 g per mu of 10% paclobutrazol wettable powder, spray with 50-60 L of water per mu, which can inhibit the elongation of rice stems, making the internodes short, thick, and dwarfed, thereby preventing lodging and promoting increased yield.
II. Methods of using paclobutrazol on soybeans:
For vigorously growing soybeans, spray a 0.0002% paclobutrazol solution at the early flowering stage of soybeans, which can effectively regulate the soybean plant type, prevent excessive growth and lodging, reduce nutrient loss, and thereby promote branching and increase yield.
III. Methods of using paclobutrazol on rapeseed:
Generally used when rapeseed seedlings grow to the three-leaf-one-heart stage, use 40-50 kg per mu of a 0.00015% paclobutrazol solution for even spraying, which can effectively cultivate strong rapeseed seedlings, prevent the occurrence of tall-leg seedlings, promote the survival rate of rapeseed after transplanting, and at the same time have a certain antifreeze effect.
IV. Methods of using paclobutrazol on fruit trees:
The use of paclobutrazol on fruit trees is mainly for soil treatment, trunk painting, and foliar spraying. But soil treatment gives the best results.
For soil treatment, use 10-15 g of 10% wettable powder per cubic meter of tree canopy, in the form of a ring-shaped fertilization ditch similar to ring fertilization, 30 cm wide and 20 cm deep, following the principle of exposing roots without injuring them, scatter the pesticide into the ditch and cover with soil. Water before and after application to maintain soil moisture.
Using the fruit tree trunk painting method, you can paint the trunk with a 150-300 times dilution of 10% paclobutrazol wettable powder.
Using the foliar spraying method, spray the leaves with a 75-150 times dilution of 15% wettable powder. For young trees, it can make the canopy dwarfed and compact, and promote early flowering and fruiting; for mature trees, it can inhibit new shoot growth, increase yield, and improve quality.
Precautions for using paclobutrazol:
1. Because paclobutrazol has a very long residual period in soil, after excessive use of paclobutrazol in some field crops or vegetable fields, it often affects the growth of subsequent crops. Therefore, when using it, attention must be paid to the selection of subsequent crops.
2. Under normal circumstances, the use of paclobutrazol will not cause phytotoxicity to crops, but when the dosage is too high and crops are excessively inhibited, rescue measures can be taken by applying more nitrogen fertilizer or spraying gibberellin.
3. Paclobutrazol should be used at most once on peanuts, with a safe interval period of 60 days. Rice should be treated with paclobutrazol at most once.
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