Fentrazamide
Action/Use:
- Herbicide
Use:
Controls barnyardgrass and annual sedges in rice.
Identification
Common Name(s): Fentrazamide (BSI, ISOPA)
Chemistry
Class: Tetrazolinone.
Formula: C16H20CIN5O2.
Properties: Form: Colorless crystals. Melting point 79°C. Vapor pressure 5 x 10-5 mPa (20°C).
Mode of Action / Resistance Management
Chemical Group: Tetrazolinone
Mode of Action: Inhibition of VLCFAs (Inhibition of cell divison)
Action Group: HRAC Group K3; WSSA Group 15
Registration
Outside U.S.A.: Japan, Korea, Malaysia, Philippines, Sri Lanka, Thailand and Vietnam.
Environmental Guidelines
Hazards: Fish: LC50 (96 h) 3.2 mg/l (carp); 3.4 mg/l (rainbow trout); LC50 (24 h) >10 mg/l (Daphnia). Bird: Oral LD50 (14 d) >2000 mg/kg (bobwhite quail, Japanese quail). Bee: LD50 (topical) for honeybees >150 µg/bee
Water Solubility: Pure water, photolysis DT50 c. 20 d; natural water, c. 10 d (both 25°C)
Safety Guidelines
Toxicity: (Rat): Oral LD50 >5000 mg/kg. Dermal LD50 >5000 mg/kg. Inhalation LC50 >5000 mg/m3
Suppliers and Branded Products
Basic Producers:
Bayer CropScience (Lecs*)
Premix Products:
+ Bensulfuron-methyl
- Innova* — Bayer CropScience
+ Propanil
- Lecspro* — Bayer CropScience
+ Tefuryltrione
- Bodyguard* — Bayer CropScience
