Seedicide

Seedicide is an item received as a reward from participating in the Cabbage Facepunch Bonanza activity. Once bought and configured, it will automatically destroy selected seeds dropped by monsters in combat, in exchange for double the experience the player would normally receive from planting the seeds in a farming patch. It does not work with Herblore Habitat seeds, or pickpocketing Master Farmers. In order to obtain Seedicide, the player must participate in the Cabbage Facepunch Bonanza activity, until they have accumulated 2200 Renown points. Upon talking to the Quartermaster with the required points, the player may purchase one.

Trivia

 * There is currently a glitch where the seedicide does not have to be in the player's inventory to work.
 * There is currently a glitch where whiteberry seeds do not get converted.
 * There is currently a glitch where fellstalk seeds do not get converted.
 * There is a toggle for white lily seeds despite no monsters drop them.