• (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.