Representative Dan Burton, the Indiana Republican who is chairman of the Western Hemisphere subcommittee, said he thought the Colombians should be using a more powerful herbicide.

The American Cyanamid Company won patent approval this week for a family of powerful herbicides, or weed killers, that the company said pose no threat to humans and animals.

A task force of experts has been formed to devise a strategy for treating Austin's Treaty Oak, which was poisoned when someone poured a powerful herbicide around its base.

Atrazine is a powerful herbicide applied to 70 percent of America's cornfields.

Agent Orange is a very powerful herbicide that was used in the Vietnam War.

Agent Orange is the code name for a powerful herbicide and defoliant used by the U.S. military during the Vietnam War.

The testing, which is contingent on final approval by the Peruvian Government, would involve the aerial spraying of powerful herbicides.

Agent White is the code name for a powerful herbicide and defoliant used by the U.S. military in its Herbicidal warfare program during the Vietnam War.

A jury today found a man guilty in the poisoning of the Treaty Oak, a centuries-old tree that was severely damaged by a powerful herbicide.

A powerful herbicide was applied to the stumps to prevent them from sprouting.