Butachlor

Nomenclature

Common name:Butachlor (BSI, draft E-ISO, (m) draft F-ISO, ANSI, WSSA, JMAF); no name (France)
IUPAC name: N-butoxymethyl-2-chloro-2\',6\'-diethylacetanilide
Chemical abstracts name:N-(butoxymethyl)-2-chloro-N-(2, 6-diethylphenyl)acetamide
CAS RN: [23184-66-9]

Applications

Biochemistry: It inhibits cell division by blocking protein synthesis; more recentresearch suggests chloroacetamides may inhibit synthesis of very long chainfatty acids (J. Schmalfuss et al., Abstr. Meeting WSSA, Toronto, 40, 117-118, 2000; P. Bger, Abstr.III Int. Weed Control Congr., Brazil 2000).
Mode of action: It is a selectivesystemic herbicide, absorbed primarily by the germinating shoots, andsecondarily by the roots, with translocation throughout the plant, givinghigher concentrations in vegetative parts than in reproductive parts.
Uses: Butachlor is used pre-emergence for the control ofannual grasses and certain broad-leaved weeds in rice, both seeded andtransplanted. It shows selectivity in barley, cotton, peanuts, sugar beet,wheat and several brassica crops. Effective rates of butachlor range from 1.0-4.5 kg/ha. Activity is dependent on wateravailability such as rainfall following treatment, overhead irrigation orapplications to standing water as in rice culture.
Phytotoxicity: Non-phytotoxic torice, cotton, barley, wheat, peanuts, sugar beet, and some brassicas.
Formulation types: EC; GR.

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