Used in carnations, gladioli, roses, fruit trees and bushes (including citrus), vines, ornamental trees and shrubs, hops, cotton, rice, soya beans, sunflowers, onions, and turf. Also can be used in cotton, rice, soybean and sunflower and acts by inhibiting protoporphyrinogen oxidase.
OXADIAZON
Common name:Oxadiazon Chemical name:
3-(2,4-Dichlor-5-(1-methylethoxy)phenyl)-5-(1,1-dimethylethyl)-1,3,4-oxadiazol-2(3H)-one 5-tert-Butyl-3-(2,4-dichlor-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-one
Other names：
Ronstar
Molecular formulae: C15H18Cl2N2O3
Chemical structure:
Physical and Chemical Properties
Molecular weight:345.2g/mol; Physical form: Colourless, odourless crystals. Composition: Tech. is 95% pure. Melting point:87℃; Vapour pressure:0.1 mPa (25 ℃); Henry constant:3.5 × 10-2 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water): logP =
4.91 (20℃); Solubility: In water 1.0 mg/l (20 ℃). In methanol, ethanol c. 100, cyclohexane 200, acetone, isophorone, methyl ethyl ketone, carbon tetrachloride c. 600, toluene, benzene, chloroform c. 1000 (all in g/l, 20℃).; Stability: Stable in neutral or acidic medium, relatively unstable in alkali; DT50 38 d (pH 9, 25℃).
Purity: 95%, 98%
Uses: Used in carnations, gladioli, roses, fruit trees and bushes (including citrus), vines, ornamental trees and shrubs, hops, cotton, rice, soya beans, sunflowers, onions, and turf. Also can be used in cotton, rice, soybean and sunflower and acts by inhibiting protoporphyrinogen oxidase.
Mode of actions:
Oxadiazon is as preemergence used and post-emergence herbicide. Selective contact herbicide and Biochemistry Protoporphyrinogen oxidase inhibitor. Uses Pre-emergence control of bindweed, annual broad-leaved weeds and grasses, and post-emergence control of bindweed and annual broad-leaved weeds.
Toxicology:
Oral: Acute oral LD50 for rats:5000 mg/ kg.
Percutaneous: Acute percutaneous LD50 for rats and rabbits :2000 mg/kg. Slightly irritating to eyes; negligible irritant to skin (rabbits).
Inhalation: LC50 (4 h) for rats:2.77 mg/l.
Phytotoxicity: Carnations are tolerant of over-the-top, post-emergence application. Not to be used on red fescue, bentgrass turf, dichronda or centipedegrass.
Environmental Profile
Ecotoxicology:
Algae: EC50: 6-3000μg/l. Bees: LD50:400μg/bee, with repellent effect. Mortality is negligible by direct contact at doses up to 27 kg a.i./8 ha. Birds: Acute oral LD50(24 d) for mallard ducks :1000, bobwhite quail :2150 mg/ kg. Daphnia: EC50 (48 h) :2.4 mg/l. Fish: LC50(96 h) for rainbow trout and bluegill sunfish 1.2 mg/l. Worms: Not toxic at recommended rate.
Environmental fate:
Animals: In mammals, following oral administration, 93% is eliminated within 72 hours, predominantly in the urine. Soil: Strongly adsorbed by soil colloids and humus, with very little migration or leaching. Negligible loss due to volatilisation. Half-life in soil is 3-6 mo.
Plant: Oxadiazon penetrates plants primarily via shoots and leaves and is rapidly metabolised. Metabolites do not accumulate in the plant. WATER SOLUBILITY: Insoluble
Transportation Information:
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)
Other products:
Straight Formulated Products:
Oxadiazon 120g/L EC; Oxadiazon 26% EC; Oxadiazon 35%SC;
Mixtures:
Oxadiazon +Oxyfluorfen; Emulsifiable concentrate. Butachlor+oxadiazon
Emulsifiable concentrates, granules, flowable, wettable powder. Premix Parters: beta-cyfluthrin.
