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Crop Protection Database

Paclobutrazol

Action/Use:
  • Plant Growth Regulator
Use: Bonzi*, Piccolo*, Piccolo* 10 XC and Tide Paclo* for ornamentals. Cultar* for orchard crops.
Identification
Common Name(s): Paclobutrazol (ANSI, ISO, BSI)
Chemistry
Properties: Milk-white odorless liquid boiling at >100°C. Vapor pressure, 22 mm/Hg at 20°C. Specific gravity, 1.05 with pH 7.68; 5% in H2O. Cultar*: White crystalline solid. Melting point 165°C. Solubility: Bonzi*: miscible. Cultar*: variable in range of organic solvents.
Paclobutrazol
Registration
Outside U.S.A.: Avocet* in South Africa. Piccolo* in Canada.
Environmental Guidelines
Water Solubility: Cultar*: 35 ppm
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: Bonzi* (Rat): Oral LD50 5346 mg/kg. Inhalation LC50 369 mg/l (a.i./4 h). (Rabbit): Dermal LD50 >1000 mg/kg. Non-irritating to eye, skin. Cultar* (Rat): Oral LD50 1300-2000 mg/kg
Handling/storage Cautions: Bonzi*: Avoid ingestion, inhalation, and contact with skin, eyes, or clothing. Wash thoroughly with soap and water after handling. Do not contaminate water or wetlands by storage, cleaning of equipment, or disposal of wastes. Avoid extreme heat. Do not store near food, feed, or within reach of children
Product/waste Disposal: Discarded material is not hazardous under RCRA. May be disposed of on-site or at an approved waste disposal facility. Do not burn
Discontinued Names:
Advika*
Avocet*
Clipper*
Duo Xiao Zuo*