Diflufenzopyr-sodium will only be available in combination products.
Type |
AI concn |
Diflufenzopyr-sodium will only be available in combination products. |
Acute oral (rat) : LD50 >5,000 mg/kg.
Bluegill sunfish [96 h] |
LD50 >135 mg/L |
Mallard duck |
LD50 >5,620 ppm |
Bee [contact] |
LD50 >90 μg/bee |
Rainbow trout[96 h] |
LC50 106 mg/L |
Bobwhite quail |
LD50 >2250 mg/kg |
Daphnia magna[48 h] |
EC50 15 mg/L |
Green algae [5 d] |
EC50 0.11 mg/L |
Fate in :
In acute studies submitted to the US EPA, diflufenzopyr-sodium was found to be practically non-toxic to avian species and honey bees and of low toxicity to small mammals. It was classed as slightly toxic to practically non-toxic to freshwater organisms and estuarine/marine organisms.
Diflufenzopyr-sodium is a herbicide and is classed as highly toxic to terrestrial plant species.
Fate in soil:
The half-life of diflufenzopyr-sodium in aerobic soil in laboratory tests is 8-10 days; in a field dissipation study in Canada, the parent half-life was 4 days. The photolysis half-life of diflufenzopyr-sodium on soil is 13 days.
Diflufenzopyr-sodium is classed as mobile to very mobile in soil (Koc = 18-156 mL/g) as are its major metabolites (Koc = 128-1087).
Fate in water:
The hydrolysis half-life is 13 days (pH 5), 24 days (pH 7), 26 days (pH 9).
The photolysis half-life is 7 days (pH 5), 17 days (pH 7), 13 days (pH 9).
The aerobic aquatic metabolism half-life is 25-26 days.
The anaerobic aquatic metabolism half-life is 20 days.
Based on the data submitted and the anticipated use patterns, the US EPA does not predict that diflufenzopyr-sodium will pose a risk to drinking water sources.
Canada granted continued registration of diflufenzopyr-sodium