L1 /
2
CH3041
BIPYRIDYLIUM
HERBICIDES
Classification of Herbicides
:
(i) Bipyridylium : two
pyridine rings
Paraquat is a contact herbicide (local) that causes rapid plant tissue damage by cell membrane destruction (dead within hours).
Paraquat is a contact herbicide (local) that causes rapid plant tissue damage by cell membrane destruction (dead within hours).
• Pre-emergent
herbicide, used to eliminate
weeds from fields before the crop sprouts.
weeds from fields before the crop sprouts.
• Popular for
destroying crops of marijuana.
• The quaternary nitrogens makes it ionic,
it has a high water solubility but binds
irreversibly to soil by ion-exchange and is
not mobile in the environment.
it has a high water solubility but binds
irreversibly to soil by ion-exchange and is
not mobile in the environment.
• LD50 (Rat) 57 mg kg-1 IC
