Back باكلوبوترازول Arabic پاکلوبوترازول AZB Paclobutrazol Catalan Paclobutrazol German Paclobutrazol Spanish پاکلوبوترازول Persian Paclobutrazol French パクロブトラゾール Japanese Paclobutrazol Portuguese Paklobutrazol Serbo-Croatian
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| Names | |
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| IUPAC name
(2RS,3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)-3-pentanol
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| Other names
PP333
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| Identifiers | |
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3D model (JSmol)
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| Abbreviations | PBZ |
| ChEBI |
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| ChemSpider | |
| ECHA InfoCard | 100.121.374 |
PubChem CID
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| UNII |
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CompTox Dashboard (EPA)
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| Properties[1] | |
| C15H20ClN3O | |
| Molar mass | 293.80 g·mol−1 |
| Appearance | White crystalline solid |
| Density | 1.23 g/cm3 |
| Melting point | 165-166°C |
| Boiling point | 460.9 °C (861.6 °F; 734.0 K) at 760 mHg |
| 22.9 mg/L (20 °C) | |
| log P | 3.11 |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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Xn |
| Flash point | 232.6 °C (450.7 °F; 505.8 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Paclobutrazol (PBZ) is the ISO common name for an organic compound that is used as a plant growth retardant and triazole fungicide.[2][3] It is a known antagonist of the plant hormone gibberellin, acting by inhibiting gibberellin biosynthesis, reducing internodal growth to give stouter stems, increasing root growth, causing early fruitset and increasing seedset in plants such as tomato and pepper. PBZ has also been shown to reduce frost sensitivity in plants. Moreover, paclobutrazol can be used as a chemical approach for reducing the risk of lodging in cereal crops. PBZ has been used by arborists to reduce shoot growth and shown to have additional positive effects on trees and shrubs. Among those are improved resistance to drought stress, darker green leaves, higher resistance against fungi and bacteria, and enhanced development of roots. Cambial growth, as well as shoot growth, has been shown to be reduced in some tree species.
- ^ Pesticide Properties Database. "Paclobutrazol". University of Hertfordshire.
- ^ "Compendium of Pesticide Common Names: paclobutrazol". BCPC.
- ^ Tesfahun, Wakjira (January 1, 2018). Yildiz, Fatih (ed.). "A review on: Response of crops to paclobutrazol application". Cogent Food & Agriculture. 4 (1): 1–9. Bibcode:2018CogFA...425169T. doi:10.1080/23311932.2018.1525169. S2CID 134517280.