weedkiller that has been used by the American government to destroy cannabis plantations since the 1970s. It led to the great Paraquat Scare of 1976, where pot-heads believed they were smoking contaminated marijuana

A standard herbicide used to kill various types of crops, including marijuana.

a poisonous yellow solid used in solution as a herbicide

Chemical defoliant used to kill marijuana plants

1,1'-dimethyl-4,4'-bipyridylium dichloride, a nonselective contact herbicide that produces profound pulmonary damage following acute exposure.