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CH3041
PHOSPHONATE
HERBICIDES
• (iv) Phosphonates : eg. Glyphosate
Non-selective herbicides.
Roundup® is used for weed
control. Post-emergent plant growth regulator (systemic) used for the control of grasses & broadleaved weeds.
• Glyphosate is water soluble (12 g/L).
• LD50 4900 mg/kg. Binds to clays.
• Decays in soil with t1/2 60 d.
• Does not bioaccumulate. HPLC
• Monsanto have genetically engineered 
  soybeans so they are resistant to glyphosate.
• RR Cotton may be weeded using glyphosate.