Propachlor (2-chloro-N-isopropylacetanilide) is an herbicide first marketed by Monsanto. It was registered for use in the United States during 1965. The preparation acts on annual grasses and on some broadleaf plants. Between 1987 and 1996, about 2.1 million pounds of its active ingredient were used in the United States. 75% was applied to sorghum...