Chemical Identification
Common Name
Flufenpyr-ethyl
中文通用名
氟哒嗪草酯
IUPAC
ethyl 2-chloro-5-[1,6-dihydro-5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1-yl]-4-fluorophenoxyacetate
CAS
ethyl [2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl]phenoxy]acetate
CAS No.
188489-07-8
Molecular Formula
C16H13ClF4N2O4
Molecular Structure
Category
Activity
Herbicide
Two studies were conducted in 2002 to evaluate flufenpyr-ethyl tank-mixed with glyphosate for morningglory control in Roundup Ready corn and soybean (Southern Illinois University Weed Research Annual Report, 2002). In the corn system, crop injury from flufenpyr-ethyl was 9-12% at 7 days after treatment (DAT). Injury decreased over time and no injury was observed from any treatment at 28 DAT. Tank-mixing flufenpyr-ethyl with Roundup UltraMax, which alone controlled 95% of waterhemp, 94% of ivyleaf morningglory and 99% of velvetleaf at 14 DAT, increased waterhemp and ivyleaf morningglory control to 97 or 99%. These values however were not always significant due to the high level of weed control provided by Roundup UltraMax alone. In the soybean system, soybean injury was 3% for treatments containing flufenpyr-ethyl at both 7 and 14 DAT; all crop injury had decreased by 28 DAT. The addition of flufenpyr-ethyl to Roundup UltraMax increased control of morningglory species throughout the treatment, with levels of control at 56 DAT ranging from 77 to 95% compared to 60% for Roundup UltraMax alone. The addition of flufenpyr-ethyl to Roundup UltraMax also increased control of velvetleaf at all timings by 18 to 27%. Complete control (99%) of common cocklebur was observed. No differences were observed in the level of weed control provided by flufenpyr-ethyl at 0.39 oz/A compared to the 0.5 oz/A rate.

Field trials conducted by the Southern Illinois University in 2000 showed that S-3153 at 20 g\ha plus adjuvant provided good (>90%) post-emergence control of Ipomoea spp, Abutilon theophrasti, Xanthium strumarium and Ambrosia artemisifolia at 28 days after treatment (DAT) with acceptable effects (5% or less) on corn. Weeds were 4-8" in height at application. The weed control efficacy was superior to that provided by Clarity (dicamba), Distinct (diflufenzopyr + dicamba) and Weedone (2,4-D) and superior overall to Accent (nicosulfuron), Aatrex (atrazine) and Beacon (primisulfuron). Initial corn damage was more severe than the standards but was largely outgrown by 28 DAT.
CropUse
CropUses:
beans, dry beans, lima beans, maize , snap beans, soybeans, sugar cane

 

17 – 104 g ai/ha

Toxicology

Subchronic oral (90 d, rat): NOAEL = > 1,434 mg/kg/

Transport Information
Hazard Class:O (Obsolete as pesticide, not classified)

Porduct NewsMore

Valent voluntarily cancels flufenpyr-ethyl registrations in USA

Flufenpyr-ethyl

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