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Diclofop-methyl |
| chemical name: |
±-2-[4-(2,4-dichlorophenoxy)phenoxy phenoxy] propanoic acid |
| Molecular weight: |
327.2
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| Molecular formular: |
C15H12CI203 |
Mode of action: |
Diclofop-methyl is a selective systemic herbicide, also with
Contact action, absorbed primarily by the leaves, with some absorption by the
Roots in moist soil.Undergoes rapid transformation to diclofop, which is translocated within the plant.Diclofop-methyl(R)-(+)-enantiomer shows significantly greater herbicidal activity by foliar application to 3 weed specides
Than does the s-enantiomer, but there was less difference by soil application. |
Uses: |
For post-emergence control of wild oats, wild millets, and other annual
Grass weeds in wheat , barly, rye, red fescue and broad-leaved crops such as soya
Beans, sugar beet, fodder beet, flax, legumes, oilseed rape, sunflowers, clover,
Alfalfa, peanuts, brassicas, carrots, celery, beetroot , parsnips, lettuce, spinach
Potatoes,cucumbers, peas, beans tomatoes, fennel , alliums, herbs, etc. |
Physical chemistry: |
Form: Colourless crystals, Melting point:39-41
. Vapour pressure:0.25mPa(20℃) .7.7mPa 3.1x10-6 mPa(50℃) Kow logP=4.58.
Henry 6.1×10-5 Pa m3 mol-1. S.g./density:1.30 (40℃). Solubility: In water 0.8 g/l (pH 5.7 20℃), In acetone, dichloromethane, dimethyl sulfoxide, ethyl acetate,
Toluene >500 g/l; in polyethylene glycol 148, methanol 120, isopropanol 51, n-hex
Ane 50 (all in g/l,20℃) Stability stable to light in water DT50(25℃),363 D (pH 5)
31.7(pH 7), 0.52d (pH 9). |
Mammalian toxicology: |
Oral Acute oral LD50 for rats 481-693 mg/kg( in sesame oil)
Dogs for 1600 mg/kg( highest dose without induction of vomiting)Skin and eye
Acute percutaneous LD50 for rats >5000.mg/kg, Inhalation LC50(4h) for rats >
1.36 mg/l air NOEL (2y) for rats 0.1mg/kg b.w.. (15 mo)for dogs 0.44mg/kg b.w.,
Rats 160mg/kg b.w.daily, reproduction NOEL for rats 50mg/kg b.w. daily, ADI
0.001 mg/kg b.w. Toxicity Class WHO (a.i.)III; EPA (formulation III) EC hazard Xn; R22 R43|N;R50,,R53 |
Ecotoxicology: |
Birds Acute oral LD50 for Janpanese quail〉10 000 mg/kg.
Dietary LD50 (5 d) for bobwhite quail>1600, mallard ducks >11 00mg/kg b.w.
Fish LC50(96 h)for rainbow trout > 0.23 mg/l, Daphnia LC50(48 h) 0.23mg/l. Algae LC50 (72 h) for Scenedesmus subspicatus 1.5mg/l, (120 h) for Selenastrum capricornutum
0.53 mg/l Bees NOT toxic to bees under field conditions and application rate of
1.134 kg a.i./ha. Worms: LC50 (14 d) for earthworms〉1000 mg/kg soil, dry weight.; |
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