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Clethodim

Clethodim 90%TC
Clethodim 24%EC
Clethodim 12%EC

Herbicide
HRAC A WSSA 1; cyclohexanedione oxime

Clethodim NOMENCLATURE
Common name clethodim (BSI, ANSI, draft E-ISO); clétodime ((f) draft F-ISO)
IUPAC name (?-2-[(E)-1-[(E)-3-chloroallyloxyimino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxycyclohex-2-enone
Chemical Abstracts name (E,E)-(?-2-[1-[[(3-chloro-2-propenyl)oxy]imino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one
CAS RN [99129-21-2] Development codes RE-45601 (Chevron)

Clethodim PHYSICAL CHEMISTRY
Composition Tech. is >91% pure. Mol. wt. 359.9 M.f. C17H26ClNO3S Form Clear, amber liquid. B.p. Decomposes below boiling point. V.p. <1  10-2 mPa (20 ºC) S.g./density 1.14 (20 ºC) Solubility Soluble in most organic solvents. Stability Aqueous hydrolysis DT50 28 d (pH 5), 300 d (pH 7), 310 d (pH 9). Aqueous photolytic DT50 (sterile buffers, pH 5, 7 and 9) 1.7-9.6 d (without photosensitiser), 0.5-1.2 d (with photosensitiser).

COMMERCIALISATION
History Herbicide reported by R. T. Kincade et al. (Proc. 1987 Br. Crop Prot. Conf. - Weeds, 1, 49). Introduced by Chevron Chemical Co. Patents GB 2090246 Manufacturers Arvesta; Shenyang

Clethodim APPLICATIONS
Biochemistry Fatty acid synthesis inhibitor, by inhibition of acetyl CoA carboxylase (ACCase). Mode of action Systemic herbicide, rapidly absorbed and readily translocated from treated foliage to the root system and growing parts of the plant. Uses Post-emergence control of annual and perennial grasses, at 60-240 g/ha, in a wide range of broad-leaved crops (including such field crops as soya beans, cotton, flax, sunflowers, alfalfa, peanuts, oilseed rape, sugar beet, tobacco, and potatoes), vegetable crops, trees and vines. To be used with a non-phytotoxic crop oil concentrate. Phytotoxicity Good tolerance in broad-leaved crops. Formulation types EC. Compatibility Antagonism has been observed when tank-mixed with 'Basagran' or 'Blazer'. Selected products: 'Select' (Arvesta, Valent, Bayer CropScience)