Diclobutrazol (Ref: PP296) |
![]() Last updated: 11/01/2021 |
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(Also known as: dicyclobutrazole) |
SUMMARY |
Dichloburazol is a discontinued fungicide that is not approved for use in the EU. It has a low aqueous solubility and is volatile. There are significant gaps in reported fate data. Dichlobutrazol has a low mammalian toxicity but is moderately toxic to fish. It is relatively non-toxic to honeybees. |
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A discontinued fungicide that was mainly used to control mildews on a range of crops | |
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Powdery mildew; Apple mildew; Rust; Scab | |
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Cereals; Vines; Coffee; Apples & pears; Curcubits | |
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Obsolete | |
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1979, first reported |
UK regulatory status |
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Not approved | ||
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Not applicable | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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Diclobutrazol is a molecule with two chiral centres. The technical material is an isomeric mixture. | |
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C₁₅H₁₉Cl₂N₃O | |
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CC(C)(C)C(C(CC1=C(C=C(C=C1)Cl)Cl)N2C=NC=N2)O.CC(C)(C)C(C(CC1=C(C=C(C=C1)Cl)Cl)N2C=NC=N2)O | |
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CC(C)(C)[C@H]([C@@H](CC1=C(C=C(C=C1)Cl)Cl)N2C=NC=N2)O.CC(C)(C)[C@@H]([C@H](CC1=C(C=C(C=C1)Cl)Cl)N2C=NC=N2)O | |
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PLPRPHZNQBHGSP-DZYJZKBLSA-N | |
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InChI=1S/C15H19Cl2N3O/c1-15(2,3)14(21)13(20-9-18-8-19-20)6-10-4-5-11(16)7-12(10)17/h4-5,7-9,13-14,21H,6H2,1-3H3 | |
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Yes |
General status |
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Fungicide, Other substance | |
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Bactericide, Wood preservative | |
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Conazole | |
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Synthetic | |
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Systemic, absorbed through leaves, stem and roots and translocated. Known to block fungal sterol biosynthesis. | |
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75736-33-3 | |
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66345-62-9 | |
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266-324-1 | |
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421 | |
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53309 | |
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328.24 | |
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rac-(2R,3R)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol | |
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(2RS,3RS)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol | |
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(αR,βR)-rel-β-[(2,4-dichlorophenyl)methyl]-α-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol | |
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Should not be used on solanaceous crops - phytotoxic. | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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11 | |
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Off-white coloured crystalline solid |
Formulations |
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Usually formulated as a suspension concentrate |
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7.1 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | ||||||||
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148 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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6.46 X 1003 | Calculated | - | |||||||
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3.81 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
High | ||||||||
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1.25 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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<2 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Basic | |||||||||||
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0.0027 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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1.25 X 10-04 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Non-volatile | ||||||||
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Degradation |
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7 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Non-persistent | |||||||
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Data scant. Literature suggests DT₅₀ is around a week | ||||||||||
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Soil adsorption and mobility |
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Fate indices |
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Cannot be calculated | - | - | |||||||||||||||||||||||||
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> 4000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Low | ||||||||
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> 9461 | L3 L = Pesticide manuals and hard copy reference books / other sources Anas platyrhynchos3 = Unverified data of known source |
Low | ||||||||
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> 23.9 | L3 L = Pesticide manuals and hard copy reference books / other sources Oncorhynchus mykiss3 = Unverified data of known source |
Moderate | ||||||||
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9.3 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
Moderate | ||||||||
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0.05 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
High | |||||||
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0.05 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
High | ||||||||
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General |
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High (class III) | - | - | ||||||||
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> 4000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Low | ||||||||
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1000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
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Health issues |
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No further information available |
Handling issues |
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No information available | |||
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Health: H319 Environment: H411 |
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Xi - Irritant: R36 N - Dangerous for the environment: R51, R53 |
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S2, S26, S61 | |||
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O (Obsolete substance) | |||
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diclobutrazol | ||
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Record last updated: | 11/01/2021 |
Contact: | aeru@herts.ac.uk |
Please cite as: | Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |