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GIBBERELLIN |
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Tech Grade |
A4+A7 90% TC |
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Shelf Life |
2 Years |
Application
1.Gibberellin A4 + A7 is a specific proportion mixture of plant growth regulators, mainly used to promote fruit setting and improve fruit shape. It is particularly effective on apple and pear trees.
Gibberellin is not a single substance, but a general term for a large group of plant hormones. Currently, there are over a hundred known types. They are widely present in plants and regulate various physiological processes of plants, such as:
Promote stem elongation, break the dormancy of seeds and buds, induce flowering, and affect fruit setting and fruit development
In agricultural production, the types of gibberellins that we commonly use are the ones extracted from microbial fermentation and with the highest activity. Among them, the most well-known is GA3 (Gibberellin A3).
2. "A4 + A7" specifically refers to two specific types of gibberellins.
They are often produced and purified together, forming a mixture.
This mixture (GA4 + GA7) shows better effects than single GA3 in promoting fruit setting and fruit development for certain crops (especially those in the Rosaceae family), and sometimes has fewer side effects.
Main Functions and Applications
The core function of GA4+A7 is to replace or enhance endogenous plant hormones, thereby regulating growth and development. Its main applications are:
Mechanism: When sprayed during the late flowering stage or when the fruits are young, it can stimulate the enlargement of the ovary, resulting in seedless fruits and preventing fruit drop caused by poor pollination or environmental stress (such as low temperature).
Application crops: Apples, pears, plums, cherries, etc.
Mechanism: GA4 + A7 can promote cell division and elongation at the flower calyx end, making the fruits more tall and with prominent pentagonal shapes. This fruit shape is more popular in the market.
Application crops: Apples (especially for varieties with specific fruit shape requirements).
Note: To achieve the best effect of improving fruit shape, GA4 + A7 is usually mixed with another plant growth regulator, 6-BA (benzylaminopurine), and the commonly available "Promomalin" is a compound product of GA4 + GA7 and 6-BA.
On grapes, it is sometimes used to elongate the bunches.
On flowers, it can promote flowering and regulate the flowering period.
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