Ecotoxicology:
Algae:
E
rC
50 for fresh-water green algae 1100 mg/l.Bees:Not toxic to bees. Birds:
LD
50 for Japanese quail 504 mg/kg.Daphnia:
LOEC (survival) 100
mg/l.Fish:
LC
50 (96 h) for rainbow trout 521
mg/l; 165 mg/l (48 h) (bluegill); Isooctyl ester: 16 mg/l; Butoxyethanol ester: 1.1 mg/l (bluegill); 100-220 mg/l (96 h) (trout). Worms:(14 d)
c. 1000 mg/kg dry soil.
Environmental fate:
Animals:Metabolism studies suggest that dichlorprop is absorbed and excreted essentially unchanged.Soil:In soil, metabolism involves degradation of the side-chain to 2,4-dichlorophenol, ring hydroxylation, and ring opening;
DT
50 21-25 d.
K
oc c. 12-40. Due to the high rate of metabolic breakdownPlant:In plants, dichlorprop is metabolised in a similar manner to that in soil. For details of metabolites identified in barley, see G. Baerenwald
et al., Z. Naturforsch. C: Biosci., 1987,
42(4), 486.
WATER SOLUBILITY: Room temperature 825 ppm.