Active ingredient and hormonal mode of action
Alpha Naphthyl Acetic Acid (NAA) is a synthetic plant auxin. In low concentrations, it suppresses the formation of the abscission layer in flower and fruit stalks (pedicels), preventing premature shedding caused by environmental stress, drought, or heavy crop loads.
- Active constituent: Alpha Naphthyl Acetic Acid (NAA) 4.5% SL (soluble liquid)
- Chemical class: Synthetic auxin plant growth regulator
- Primary benefits: Arrests premature flower drop, increases fruit retention, and enhances fruit weight and quality
Target crops and precise dilution rates
- Cotton: Applied at square initiation and early flowering flushes to prevent boll shedding.
- Chili and tomato: Sprayed during blooming to prevent blossom drop during extreme temperature fluctuations.
- Pineapple: Applied to induce synchronized, uniform flowering and fruit sizing.
- Mango and citrus: Applied during pea-size fruit stage to prevent fruit drop.
Critical dosage rules and pack sizes
Planofix is formulated in pack sizes of 100 ml, 250 ml, 500 ml, and 1 litre, with pricing varying by bottle size and authorized distribution. Precision dosing is critical: standard dilution is 1 ml per 4.5 litres of clean water (approx. 20 to 25 ppm). Over-dosing can cause leaf epinasty, curling, or paradoxical fruit thinning.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Planofix?
Planofix contains Alpha Naphthyl Acetic Acid (NAA) 4.5% SL, a synthetic auxin plant growth regulator.
What happens if Planofix is over-dosed?
Over-dosing causes severe leaf curling, stunted growth, and premature fruit thinning; always measure precisely at 1 ml per 4.5 litres of water.
How does Planofix prevent flower drop?
It delays the formation of the abscission zone at the base of flower stalks, keeping blooms firmly attached to the plant.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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