Product Details
CasNo： 76738-62-0
MF： C15H20ClN3O
Appearance： White solid
Delivery Time： 15 days
Packing： 25kg/bag
Purity： 95%
Basic Information
- Chinese Name: 多效唑
- English Name: Paclobutrazol
- Other Names: PP333, Chlormequat Butyltriazole
- Chemical Name: (2RS, 3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol
- Molecular Weight: 293.79
- CAS Number: 76738-62-0
- EINECS Number: 266-325-7
Physicochemical Properties
- Appearance: Technical material is a white solid.
- Melting Point: 165-166℃
- Vapor Pressure: 0.001 mPa (at 20℃)
- Density: 1.22 g/ml
- Solubility: 26 mg/L in water (at 20℃); 110 g/L in acetone; 180 g/L in cyclohexanone; 100 g/L in dichloromethane; 10 g/L in hexane; 60 g/L in xylene; 150 g/L in methanol; 50 g/L in propylene glycol (at 20℃)
- Stability: Stable for over 2 years when stored at 20℃, and stable for 6 months when stored above 50℃. It does not hydrolyze at pH 4-9 and does not decompose under ultraviolet light (pH 7, for 10 days).
Mechanism of Action
Paclobutrazol is an inhibitor of endogenous gibberellin synthesis. It can also increase the activity of indole-3-acetic acid (IAA) oxidase in rice, reduce the level of endogenous IAA in rice seedlings, thereby significantly weakening the apical dominance of rice seedlings and promoting the growth of lateral buds (tillers).
Efficacy
It has effects such as delaying plant growth, inhibiting stem elongation, shortening internodes, promoting plant tillering, accelerating flower bud differentiation, enhancing plant stress resistance, and increasing yield.
Suitable Crops
It is suitable for crops including rice, wheat, peanuts, fruit trees, tobacco, rapeseed, soybeans, flowers, and lawns.
Formulations
The main formulations include 95% paclobutrazol technical material, 10% paclobutrazol wettable powder, 15% paclobutrazol wettable powder, and 25% paclobutrazol suspension concentrate.
Application Methods and Dosages
- Rice: To cultivate strong seedlings and prevent lodging: For seedlings with a seedling age of about 35 days, spray 175-200 grams per mu (1 mu ≈ 0.0667 hectares) diluted in 100 kilograms of water on the seedbed of single-cropping medium and late rice 25 days before transplanting. For high-yield plots with local overgrown and high-stemmed lodging-susceptible varieties, spray 150-175 grams per mu diluted in 100 kilograms of water 30-40 days before heading.
- Apple: Apply 15-20 grams of the drug mixed with soil per tree under the tree crown in autumn. When new shoots grow to 5-10 centimeters, spray with a 500-700 times diluted aqueous solution once every 10 days, for a total of three times.
- Peanuts: During the full flowering stage, spray 50 grams of the drug per mu diluted in 50 kilograms of water.
