Cyhalofop-butyl




 Specification
 Active Ingredient 97%min
 Appearance

White powder


 Physical and chemical properties
 Chemical Name  Butyl(R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoat
 Empirical Formula C20H20FNO4
 Molecular Weight 357.4
 Structural Formula

      

 Melting point 49.5℃
 Solubility

In water 0.44 (unbuffered), 0.46 (pH 5), 0.44 (pH 7.0) (all mg/l, 20 °C). In acetonitrile >250, n-heptane 6.06, n-octanol 16.0, dichloroethane >250, methanol >250, acetone >250, ethyl acetate >250 (all in g/l, 20 °C)

 Vapor pressure

5.3 x 10-2  mPa (25℃)


Formulations 

97%TC, 10%EC, 20%EC


Application

Post-emergence herbicide with foliar uptake only and no soil activity. A systemic herbicide that is readily absorbed by plant tissue, is moderately phloem-mobile and accumulates in meristematic regions. Grass weeds cease growth immediately after treatment, with yellow patches appearing within 2-3 days to one week, leading to necrosis and death of the whole plant within 2 to 3 weeks.

For post-emergence control of grass weeds in rice. Applied at 75-100 g/ha in tropical rice and 180-310 g/ha in temperate rice. For selectivity in Poaceae species, see M. Ito et al., J. Weed Sci. & Tech. 43(2) 122-128 (1998).



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