About Cultar
Cultar (Paclobutrazol 23% w/w, 25% w/v SC) by Syngenta India is a systemic plant growth regulator that inhibits gibberellin biosynthesis to control vegetative growth in trees and crops. It effectively reduces internode length and encourages earlier terminal bud formation in mango, pomegranate, and apple, inducing flowering and enhancing yield, fruit colour, and harvest quality. In cotton and groundnut, it restricts excess vegetative growth reducing the shedding of squares and bolls in cotton to improve retained yield. It is applied as a single soil drench in fruit trees or as a foliar spray in cotton, groundnut, and apple, in recommended crops.
Cultar Technical Composition
Composition |
Percentage (% w/w) |
Paclobutrazol (a.i.) |
23 |
Alkylated Napthalene Sulphonate Sodium Salt |
3 |
Xanthan Gum |
0.03 |
Sodium Bentonite / Aluminium Silicate |
2.5 |
Polydimethyl Siloxanes + Silica |
0.3 |
Benzisothiazolin-3-one |
0.01 |
Propylene Glycol |
5 |
Water |
Q.S. |
Total |
100.00 |
Mode of Action: Paclobutrazol's principal mode of action is the inhibition of gibberellin biosynthesis. Taken up through stem tissue or roots, it is translocated to the sub-apical meristems, where it controls tree vigour by reducing the internode length of new shoots and encouraging earlier formation of terminal buds favourably influencing fruit bud production, fruit colour, and harvest yield.
Time of Application: Soil drench after harvest or at the dormant stage for fruit trees, or foliar spray timed to key vegetative and flowering windows.
Key Features & Benefits
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Controls Vegetative Vigour: Reduces internode length and restricts excessive vegetative growth.
-
Induces Earlier Flowering: Promotes earlier terminal bud formation for more reliable flowering.
-
Enhances Fruit Bud Production, Colour & Yield: Favourably influences fruit bud set, fruit colour, and harvest yield.
-
Reduces Shedding in Cotton: Minimizes the shedding of squares and bolls, improving retained yield.
-
Restricts Vegetative Growth in Groundnut: Redirects the plant's energy from foliage to yield.
-
Single Application Convenience: Most fruit-tree uses require only one soil drench per season.
-
Systemic Movement: Absorbed via roots or stem tissue and translocated to the site of action in the sub-apical meristem.
Cultar Dosage & Recommended Crops
Crops |
Application Method |
Dosage |
Growth Stage/Time of Application |
Waiting period |
Mango Tree |
Soil Drench (Single Application) |
7–15 yrs: 15 ml/tree; 16–25 yrs: 20 ml/tree; >25 yrs: 25–40 ml/tree diluted in 5–10 L water |
Applied after fruit harvest, any time from July to October (trees at least 7 years old) |
NA |
Pomegranate |
Soil Drench (Single Application) |
3 ml/tree in 2 L water |
To induce flowering and enhance yield |
83 |
Apple |
Soil Drench (Single Application) |
10 ml/tree in 5 L water |
Dormant stage |
155 |
Apple |
Foliar Spray (Single Application) |
2 ml/Litre in 3 L water |
Green tip stage |
134 |
Cotton |
Foliar Spray (max. 2 applications) |
60 ml/acre in 200 L water/acre |
1st Spray: 55–65 days after sowing; 2nd Spray: 20–25 days after the 1st spray |
42 |
Groundnut |
Foliar Spray |
50 ml/acre in 200 L water/acre |
Only one foliar spray at the time of pegging. To enhance yield by restricting vegetative growth |
70 |
Note: For Mango, If the soil is sandy, the application rate may be reduced to 75% of the recommended quantity. For repeat use in Paclobutrazol-treated orchards, the application rate in subsequent years can be reduced to 50–75% of the first-year rate. Irrigate lightly soon after application, and subsequently once or twice a month.
Method of Application: Soil Drench or Foliar Spray, depending on the crop. For soil drench, apply in a furrow 5–10 cm deep, about 30 cm away from the trunk (mango), or as a ring-form furrow 5–7 cm deep around the active root zone (pomegranate, apple), then cover with soil. For foliar spray, use a high-volume knapsack sprayer.
Best Time to Apply: Apply strictly in the direction of the wind to prevent prolonged exposure to spray mist, and do not underdose or overdose.
Compatibility, Safety & Storage
Tank-Mix Compatibility
Consult an agronomist before tank-mixing with other fertilizers, insecticides, or fungicides.
Safety Precautions
- Wear gloves while handling and spraying.
- Avoid application during peak sunlight or windy conditions for uniform coverage.
- Do not eat, drink, or smoke while handling the product.
- Wash hands and exposed skin after application.
- Keep out of reach of children and pets.
- Store away from direct contact with eyes and skin.
Storage
Store in a cool, dry, and well-ventilated place away from direct sunlight and moisture. Keep the product in its original sealed container.
Cultar Expert Advice
"For best results, apply Cultar as a single soil drench in fruit trees at the recommended dose for the tree's age, timed to the dormant stage or after fruit harvest as specified per crop. In cotton and groundnut, follow the recommended spray schedule and dosage. Do not underdose or overdose and irrigate lightly soon after application." – BigHaat Agronomy Expert
Additional Information
- Group 3 Plant Growth Regulator (FRAC Group code 3), Chemical class: Triazole recommended for use in spray sequence or rotation with other approved products.
- Not to be used for any purpose other than those subscribed on labels & leaflets
- The product is highly toxic to wildlife and freshwater fish and highly toxic to aquatic invertebrates and should be avoided near aquaculture.
- The product is toxic to bees exposed to direct treatment and should be avoided during the active foraging period of bees.
- Optimal re-entry period: do not enter treated areas for 24 hours after application.
Disclaimer: This information is provided for reference purposes only. Always follow the recommended application guidelines outlined on the product label and accompanying leaflet.
