Paclobutrazole 40% SC
Paclobutrazole 40% SC is one of the most widely used plant growth regulators in Indian agriculture, especially trusted by mango farmers for improving flowering and fruit quality. By controlling unwanted vegetative growth, this product helps the plant redirect its energy towards producing more flowers, setting more fruit, and ultimately delivering a higher and better-quality yield.
How Paclobutrazole 40% SC Works
Paclobutrazole works by inhibiting the biosynthesis of gibberellin, a natural plant hormone responsible for cell elongation and excessive leafy growth. When gibberellin levels are reduced, the plant stops putting so much energy into growing tall stems and large leaves. Instead, this saved energy is channelled into reproductive growth — meaning more flower buds, better fruit setting, and improved fruit development. As a systemic product, it is absorbed by the plant and moves through its tissues to give a long-lasting, season-wide effect from a single correctly timed application.
Why Farmers Choose This Plant Growth Regulator
One of the most valuable benefits of Paclobutrazole 40% SC is how it solves a problem that simply adding more fertilizer cannot fix. Many farmers try to control excess vegetative growth by adjusting fertilizer doses, but this often makes the problem worse. Paclobutrazole works differently — it directly targets the hormone responsible for excess growth, switching the plant’s focus from leafy growth into flowering mode.
In mango orchards, this product is especially valued for helping trees achieve early and uniform flowering, along with better fruit colour and size at harvest. In red gram, a single foliar spray at the start of flowering can lead to more pods and heavier seeds, while in paddy, application at the tillering stage helps control excess growth and supports better grain development. Many farmers also report reduced pruning costs and easier crop management, since the plant naturally grows more compact and bushy rather than tall and unmanageable.
Key Benefits
- Controls unwanted vegetative growth
- Promotes early and uniform flowering
- Improves fruit size, colour, and overall quality
- Increases root growth and nutrient uptake
- Reduces pruning costs and supports compact plant shape
- Long-lasting effect from a single, well-timed application
Dose Chart – How Much to Use
| Method | Dose | Area |
|---|---|---|
| Foliar Spray | 2–4 ml per litre of water | Per acre (30 ml per acre in 200 litres of water for red gram/paddy) |
| Soil Application (Collar Drench) | 8 ml for trees below 10 years, 16 ml for trees above 10 years | Per tree, mixed in 10 litres of water |
| Drip Irrigation | Not recommended for this product | — |
When to Apply
- Mango (After Harvest) — apply as collar drench right after fruit harvest to prepare the tree for next season’s flowering
- Red Gram — spray at the start of the flowering stage, ideally in the evening
- Paddy — apply at the tillering stage to control excess growth
Suitable Crops
Best for mango, red gram (pigeon pea), paddy, pomegranate, citrus, and grapes. For complete plant nutrition, many farmers also use it along with Humic Acid 98% Flakes for stronger roots, Seaweed Extract Liquid for better stress tolerance, and Power PGR Liquid for an additional flowering and fruiting boost.
Safety Tips
- Do not exceed the recommended dose — overapplication may stunt growth
- Apply at the correct growth stage for best results
- Wear gloves and a mask while preparing the solution
- Keep away from children and animals
Storage Instructions
Store Paclobutrazole 40% SC in a cool, dry place away from direct sunlight and moisture. Keep the container tightly sealed and out of reach of children and animals.
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