Sodium Nitrophenolate Plant Growth Regulator Gibberellin Acid
Gibberellic acid is sometimes used in laboratory and greenhouse settings to trigger germination in seeds that would otherwise remain dormant. It is also widely used in the grape-growing industry as a hormone to induce the production of larger bunches and bigger grapes, especially Thompson seedless grapes. In the Okanagan and Creston valleys, it is also used as a growth regulator in the cherry industry. It is used on Clementine Mandarin oranges, which may otherwise cross-pollinate with other citrus and produce undesirable seeds. Applied directly on the blossoms as a spray, it allows for Clementines to produce a full crop of seedless fruit.
It can be used to extend the shelf life of flowers and cut greens in floristry. The shelf life of cut shoots of Polygonatum multiflorum 'Variegatum' kept in water is about 7 days. To extend their life after cutting, conditioning with gibberellic acid or benzyladenine is used. This doubles their possible use.
GA is widely used in the barley malting industry. A GA solution is sprayed on the barley after the steeping process is completed. This stimulates growth in otherwise partly dormant kernels and produces a uniform and rapid growth..
The Application of Gibberellic Acid 90% GA3:
| Crop | Application time | Concentration(ppm) | Application method | Performance & Effect |
| Potato | Seed treatment stage |
0.5-1 | Seed soaking | Break dormancy. Promote sprouting. Even degree of sprouting |
| Soybean | 3.5 | |||
| Cotton Ginseng | 20 | |||
| Celery | Seedling stage Growing stage |
20-100 | Foliar spray | Increase weight. |
| Green manure spinach | 10-20 | Foliar spray | Promote growth and increase production. | |
| Grape | Flowering stage | 5-10 | Dip inflorescence |
Extend inflorescence. |
| 50-150 | Induce seedless. | |||
| Citrus | 20-50 | Spray | Increase set of fruits | |
| Rice seed | 20-30 | Promote heading and flowering | ||
| Cotton | 20 | Foliar spray | Promote flower retention and reduce the falling of cotton balls. | |
| Flowers | 700 | Daub on flower bud | Premature flowering. | |
| Grape | Flowering stage | 20-50 | Dip cluster | Enlarge fruit. |
| Pineapple | 40-80 | Spray | Increase yield. | |
| Rice | 20-30 | Increase the thousand seed weight and rice yield. |
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