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isoxapyrifop
Editor	I.G. Ferris
Entity code	ISO04
CAS registry No.	87757-18-4
Family	Phenoxy hormone products
Functions	Herbicide
Chemical name	(RS)-2-[2-(4-(3,5-dichloro-2-pyridylxy) phenoxy)propiony]isoxazolidine (IUPAC) (EN)
Synonyms
Trade names	RH-0898 (Rohm & Haas); HOK-1566 (Hokko)
Other names
Last updated	20/5/2003

Fate
Environmental: Degrades rapidly in soil to a pyridyloxyphenoxypropionic acid metabolite,which in turn degrades more slowly. The half life of the active ingredient and its pyridyloxyphenoxypropionic acid metabolite in aerobic laboratory studies are 1-4 days and 30-90 days respectively.In plants :Degrades rapidly in crops.

Toxicology
Acute oral LD50 for male rats 500, female rats 1400 mg/kg. Acute percutaneous LD50 for rats >5000, for rabbits >2000 mg/kg. Slight irritation to eyes, non-irritating to skin (rabbits). Non-mutagenic and non-teratogenic (rats and rabbits). In 78 week feeding trials,no-effect level for mice was 0.02 mg/kg/day. Toxicity to birds: Acute oral LD50 for Japanese quail >5000 mg/kg. Toxicity to fish: LC50 (96hours) for bluegill sunfish 1.4,rainbow trout 1.3 mg/l. LD50 (6hours) for Daphnia >10.1 mg/l.

Detection

Sampling

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MRLs

Uses

Mode of action: Selective systematic herbicide absorbed mainly through the foliage. Inhibits the growth of meristematic tissue.

Uses: Post-emergence control of grass weeds including Echinochloa,Brachiaria,Leptochloa,and Digitaria species in rice, and Avena,Setaria,and Alopecurus species in spring wheat and durum wheat.

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Mode of action

Ecotoxicology

Plant metabolism & residues

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