Smucker Green Weeder Sprayer Attachment Combine the Green Weeder with your own backpack or handheld sprayer for powerful, drift-free herbicide application! The sponge applicator retains the liquid solution until contact is made with invasive plants or weeds. Green Weeder's money-saving design means optimal effectiveness with less chemical needed to get the job done. Compatible with 1/4' or 3/8' sprayer hose.