Herbicide is an energy weapon in Wasteland 2.
Designed by Dr. Ryan Herbison as a hand-held weed killer for giant weeds, and nicknamed "Herbicide" in his honor, the good doctor thought it would prove equally effective against giant mushrooms and thus changed its name to "Fungicide." Unfortunately, Herbison was killed by an exploding pod person before he was able to test his hypothesis.
Herbicide is a tier 1 energy weapon and alerts enemies in a 20 unit radius. One can be obtained in the Killing Fields after Ag Center is destroyed. It is located to the west of Kathy Lawson. Another can be purchased from Harold.