The utilization of chemicals to regulate crop overgrowth has been a crucial aspect of agriculture. Overgrown crops can easily lead to lodging, excessive consumption of nutrients, and ultimately result in reduced yields, poor quality, and income losses for growers.
In order to regulate internode length and decrease the vegetative growth of crops, plant growth retardants are generally sprayed. After treatment, the morphological changes of plant are as follows: the internode length is shortened, while the number of leaves and nodes remains unchanged. The plants are short but compact, and maintain their normal shape. Some popular plant growth retardants include chlormequat, mepiquat chloride, paclobutrazol, uniconazole, and prohexadione calcium.
Prohexadione calcium is a type of cyclohexane ketone plant growth regulator. It belongs to the third-generation of plant retardants and takes effect mainly through foliar treatment. Unlike the first-generation quaternary ammonium salts such as mepiquat chloride and chlormequat, and the second-generation nitrogen-containing heterocycles such as paclobutrazol and uniconazole, prohexadione calcium is less harmful to the environment and does not have residual toxicity to rotation crops. Additionally, compared to chlormequat and mepiquat chloride, prohexadione calcium has a shorter half-life and more beneficial production-enhancing and synergistic effects.
Advantages:
The primary effects of prohexadione calcium are to shorten stem elongation in many plants, regulate crop growth at nodes, increase stem thickness, make plants dwarf, and prevent lodging. It helps maintain dark green leaves that stand upright, controls flowering time, increases fruit setting rates, and promotes fruit ripening. Additionally, it improves stress resistance in plants, enhances their ability to withstand disease, cold, and drought, reduces herbicide damage, and ultimately improves harvest efficiency.
Jaliwa (Prohexadione calcium 5% SC)
Features:
It has dual activities on gibberellin metabolism, inhibiting the synthesis of GA1 (which regulates stem growth), and controlling the vegetative growth of crops, while also biosynthesizing GA4+7 (which regulates reproductive growth and the differentiation of nutrient storage organs) in shoot tips. Its impact is minimal and it has a suitable residual effect duration. Additionally, it is safe, non-toxic, no residue, does not cause premature aging, has no impact on the growth of subsequent crops, and is environmentally friendly.
1. It can inhibit vegetative growth, promote reproductive growth, increase chlorophyll content and photosynthesis, and maintain dark green stems and leaves.
2. Control flowering time, facilitate flower bud differentiation, and increase fruit setting rates.
3. Boost the accumulation of sugar and organic matter, hasten fruit color change, and improve storage durability.
4. Shorten plant internodes and resist lodging.
5. Improve plant resistance to cold, drought, and diseases, ultimately resulting in increased yields and improved fruit quality.
6. Its half-life is less than 24 hours, low toxicity, and no residue.
| Crop | Application | Dosage |
| Wheat | 7 to 10 days before jointing stage | Spray 500ml~600ml/ha of the product on stem and leaves. |
| Rice | Final stage of tillering | Spray 300ml~400ml/ha of the product on stem and leaves. |
| Medicinal plants | Flourishing period | Spray 500ml~600ml/ha of the product on stem and leaves. |
| Solanaceous | Flowering stage | Spray 300ml~600ml/ha of the product on stem and leaves. |
| Cucurbits | Flowering stage | Spray 500ml~600ml/ha of the product on stem and leaves. |
| Strawberry | Seedbed stage and final flowering stage | Spray with 1,500~2,000 times dilution on stem and leaves |
| Cotton | Bud stage, Initial flowering stage | Spray 100ml~200ml/ha of the product on stem and leaves. |
