eradicant

noun

1. A substance that serves to eradicate an infestation.

   “If inclement weather delays a scheduled protectant spray, apply an eradicant when conditions permit but within the kickback period.”

   “Some eradicants act by blocking spore production and reducing the potential of established infections to serve as sources of secondary inoculum for new infections.”

   “Usually, these eradicants exhibit a wide range of control over many organisms, and are detrimental to the crop as well.”