Spraying gibberellin on the inflorescence before flowering can lengthen the panicle axis, but research shows that it will reduce the fruit setting rate and make the fruit smaller. If the treatment is too late, the fruit may be knocked off during the treatment, resulting in a decrease in fruit setting rate.
Gibberellic acid is an efficient plant growth regulator and stimulator, which can significantly promote cell elongation, division and differentiation. It can effectively break seed dormancy, promote germination and accelerate growth and development. It can also induce jointing and flowering of plants and promote fruit setting and fruit growth.
However, gibberellin, a plant growth regulator, is neither a nutrient nor a panacea. The high yield, high quality and high benefit of grapes must be based on reasonable comprehensive cultivation techniques such as soil, fertilizer, water and shelf management.
Extended data
Matters needing attention in the use of gibberellic acid
1. Although gibberellin can keep fruits strong and accelerate the growth and development of plants, it is not a fertilizer, let alone a substitute for it.
2. When used for fruit protection, crown spraying should be combined with foliar fertilizer spraying, and the liquid medicine should be sprayed on the fruit as much as possible, and at the same time, attention should be paid to strengthening fertilizer and pest control to ensure the demand for fertilizer and water for rapid fruit expansion.
3, reasonable collocation, grasp the weather conditions when spraying cloth. Gibberellin is easy to decompose in case of alkali, so neutral water should be used to prepare liquid medicine, and it should not be mixed with alkaline fertilizer and alkaline pesticide.
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