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Quick Details

  • Classification: Plant Growth Regulator
  • CAS No.: 76738-62-0
  • Other Names: PP333
  • MF: C15H20CLN3O
  • EINECS No.: 266-325-7
  • Place of Origin: Hunan, China (Mainland)
  • State: Powder
  • Purity: 15%Min
  • Application: Plant Growth Regulator
  • Brand Name: New Sunshine
  • Model Number: PAC15
  • 95% TC: 30% WP
  • 15% WP: 25% SC

Packaging & Delivery

Packaging Details 1KG/Al.Foil bag, 25KGS/Paper drum
Delivery Time Within 3 working days after receipt of payment

Paclobutrazol mango growth regulator


1. Basic Information of paclobutrazol


Product name






Chemical name

(2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol; Bonzi; (2RS,3RS)-1(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol; (2RS,3RS)-1-(4-chloro phenyl)-4,4-methyl-2-(1H-1,2,4-triazol-1-yl)-E-3-ol.



Plant growth regulator/ Agrochemical


95% TC , 30% / 25% /15% WP, 25% SC

Physical and chemical properties

1.The pure product is a white crystalline solid; relative density is 1.22; the melting point was 165 ~ 166 °C; vapor pressure (20 °C) is 1 × l0-6Pa, 20 °C for 0.1Pa, (30 °C) is 8 × 10-6Pa. 20 °C

2. Solubility: acetone 110g/L, 150g/L of methanol, hexane dichloromethane 100g/L, 10g/L, 180g/L xylene cyclohexanone, 60g/L, water 35mg/L. The distribution coefficient (octanol / water) 1590.

3. The pure product at 50 °C stable within 6 months. On the UV stable. Stable water solution of more than 30d at room temperature.



 Paclobutrazol is a kind of low toxicity plant growth regulator.



 2. Mode of Actions:

Mode of actions
1). Inhibits the stem growth and breaks the apical dominance(can inhibit the generation of Gibberellic acid);
2).  Inhibits the internodal elongation, resists to lodging;
3). Improves the abilities of stress tolerance
4). Promotes the lateral bud growth
5). Enhances or inhibits the photosynthesis, depends on the concentration
6). Improves the respiration intensity of root, slows down the respiration of aboveground parts of crops.


3. Applications of paclobutrazol 15% WP


CropsProcessing periodConcentrationEffects
RiceBefore the period of one-leaf seeding bed300mg/LPlant elongation are slowed, the length of stems are controled and tillers are promoted, resist lodging, the yield of rice is improved.
ColeseedDuring the period of three-leaf100-200mg/LInhibit elongation of stems and make them strong; promote the synthesis of chlorophyll , photosynthetic rate ; sclerotinia resistance enhanced; pod yieldincreased.
SoybeanDuring flowering period100-200mg/LIncrease pod yield.
Baley2-leaf seeding bed period200mg/LIncreased tillering, increase the panicle number, increase production.
Fruits ( ex: apple, pear, peach)Sprouting perod in spring500mg/LControl the vegetative growth, promote fruit set, increase the fruit quantity.


4. Matters need attention



1). Strict control of the dosage. Althogh the higher the concentration of paclobutrazol is, the length contorl effect stronger , but the amount of growth will also be declined.


2). The effect of control length and keep tillers will be declined with the increase of seeding rate. The seeding rate of hybrid late rice should not exceed 30kg/acre.


3). After application, flood irrigation and excessive application of nitrogen fertilizer should be avoid.


4). Nitrogen fertilizers or gibberellic acid could be applied in the case of excessive inhibitation of seeding which was casued by high concentration.


5). Paclobutrizol have different effects on different kinds of rice and barley. When being applied, the dosage should be flexible increase and decrease appropriately.


6). After harvest, the plots must be plowed, to prevent inhibitation to the after crops.



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