Paclobutrazol is a plant growth regulator known for its ability to suppress the top growth of plants, regulate morphological differentiation, stimulate the development of lateral buds, encourage flower bud formation, increase flower retention rates, and enhance overall plant resilience. When using paclobutrazol, it's important to follow specific techniques to ensure optimal results.
One common method of application is through soaking, soil treatment, or foliar spraying. Soaking, soil application, and leaf spraying tend to have the most noticeable effects, as they provide longer-lasting and more stable results. For soil application, there are two main approaches. First, when planting leafy crops in the ground, you should dig an annular trench about 5 cm deep around the plant canopy and evenly distribute the pesticide into the trench before watering. For potted plants in greenhouses, after applying the pesticide to the potting soil, water should be added immediately to ensure absorption.
Foliar spraying is typically done during the early growth stage. The timing and concentration of the spray depend on the type of flower, soil conditions, and nutrient levels. Spraying is usually done using a fertilizer sprayer, but care must be taken to ensure even coverage over the growing points of the plant.
The dosage and concentration of paclobutrazol vary depending on factors such as the plant variety, soil quality, age, and growth stage. For soil application, the typical rate is around 0.25 grams per square meter. Foliar sprays are generally applied at concentrations between 800 ppm and 1500 ppm, while root soaking requires a concentration of 70 mg to 90 mg per liter, with a soaking time of approximately 5 to 8 hours.
The timing of application also varies depending on the method used. It is recommended to apply soil treatments before spring flower buds begin to emerge. For foliar sprays, the best time is when new shoots reach about 10 to 15 cm in length. For deciduous flowering plants, application can be done slightly earlier to ensure the desired effects take place in time. Proper timing and technique are essential to maximize the benefits of paclobutrazol while avoiding any potential negative impacts on plant growth.
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