Natural Plant Growth hormones Gibberellins Gibberellic acid GA4+7 for apple
Gibberellic acid A4, A7 is a biological fermentation product with a white crystalline powder appearance. It is a plant growth regulator and is one of the important hormones to promote plant growth and development. Its active ingredients have the properties of promoting cell and stem elongation, leaf expansion, parthenocarpy, fruit growth, breaking seed dormancy, changing the ratio of male and female flowers, affecting flowering time, and reducing flower and fruit shedding.
Physical and chemical properties
Molecular Formula: GA4: C19H24O5 GA7: C19H22O5
Molecular Weight: GA4: 332.39 GA7: 330.37
Proportion of GA4:GA7: 65:35
Appearance: white crystal powder
Melting point is between 198-202°C
Odor: Odorless
Toxicity: Gibberellic acid is safe to human and livestocks. The acute oral dosage to young mice( LD50 ) > 15000mg/kg.
Solubility: Water Insoluble. soluble in alcohol well
Application
√ For apple, used to reduce russetting in apples, The roles are fruit thinning, changing fruit shape
and size, increasing weight of single fruit, thickening skin and prolonging the storage period.
√ Increase the fruit set in pears, and increase the germination and yield of celery.
√ Application rate 20g/ha
Note: Do not apply when the temperature is below 7°C or above 32°C.
| Function | Crop | Concentration (mg/L) | How to use |
| Adjust fruit shape | Apple | 12.5~25 | Spray 1 time for apple tree in full bloom, after bloom, and young fruit period |
| Pear | 0.4~0.5mg/fruit | Pear blossom blooms for 25~35d, smear the stalk once | |
| Promote fruit setting | Grape | 1.8~3.6 | Spray during young fruit period |
| Jujube | 1.8~3.6 | Spray 1~3 times at the initial flowering stage, with an interval of 10d | |
| Citrus, lychee, longan | 2.5~5 | Spray the whole plant at the initial flowering or young fruit stage |
Package: 1kg/bag, 25kg/drum
Customized formulation Gibberilic acid (GA4+7) GA4/7 1.9%+6-BA 1.9% available
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