Pesticides >> Insecticides >> Beta-cyfluthrin

Beta-cyfluthrin

Insecticide
pyrethroid

NOMENCLATURE
Common name beta-cyfluthrin (BSI, draft E-ISO); beta-cyfluthrine ((f) draft F-ISO); cyfluthrin-beta (Canada)
IUPAC name (RS)-a-cyano-4-fluoro-3-phenoxybenzyl (1RS,3RS;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
Chemical Abstracts name cyano(4-fluoro-3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate
CAS RN [68359-37-5] unstated stereochemistry EEC no. 269-855-7 Development codes FCR 4545 (Bayer) Official codes OMS 3051

Beta-cyfluthrin APPLICATIONS
Mode of action Non-systemic insecticide with contact and stomach action. Acts on the nervous system, with rapid knockdown and long residual activity. Uses Insecticide effective against Lepidoptera, Coleoptera, Hemiptera and Homoptera on cotton, fruit, vegetables, cereals and other crops, at 7.5-20 g/ha. Also against migratory locusts and grasshoppers; and in animal health. Formulation types EC; EW; GR; UL; SC. Selected tradenames: 'Bulldock' (Bayer); 'Responsar' (animal health) (Bayer); mixtures: 'Chinook' (+ imidacloprid) (Bayer); 'Poncho' (+ imidacloprid) (Bayer)

Beta-cyfluthrin OTHER TRADENAMES
'Bullock' (Bayer); 'Ducat' (Bayer); 'Full' (Bayer) mixtures: 'Confidor Ultra' (+ imidacloprid) (Bayer)

ANALYSIS
Details of methods for product and residue analysis available from Bayer AG. Analysis of pyrethroids reviewed by E. Papadopoulou-Mourkidou in Comp. Analyt. Profiles.

MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for rats c. 500 mg/kg (in polyethyleneglycol), c. 270 mg/kg (xylene), c. 15 mg/kg (cremophor/water); for mice c. 140 mg/kg. Skin and eye Acute percutaneous LD50 (24 h) for rats >5000 mg/kg. No irritation to skin and slight primary irritation to the eye (rabbits). Inhalation LC50 (4 h) for rats c. 0.1 mg/l (aerosol), 0.53 mg/l (dust). NOEL (90 d) for rats 125, dogs 60 mg/kg diet. ADI 0.02 mg/kg b.w. Toxicity class WHO (a.i.) Ib; EPA (formulation) II EC hazard T+; R26/28| N; R50, R53

ECOTOXICOLOGY
Birds Acute oral LD50 for Japanese quail >2000 mg/kg. Fish LC50 (96 h) for golden orfe 330.9, rainbow trout 89, bluegill sunfish 28 ng/l. Daphnia LC50 (48 h) 0.00029-0.0018 mg/l.

ENVIRONMENTAL FATE
Animals Beta-cyfluthrin was largely and very quickly eliminated; 98% was eliminated after 48 h via the urine and the faeces. Plants Since beta-cyfluthrin is not systemic, it penetrates only slightly into the plant tissues and is hardly translocated into other plant parts. The concentration is very low and can be neglected. Soil/Environment Degradation in different soils is rapid. Leaching behaviour can be classified as immobile. The metabolites of beta-cyfluthrin are readily accessible to further microbial degradation to the point of mineralisation to CO2 in the soil.