The role of a sticker in pesticide spraying is primarily to:

• A. Improve spread
• B. Increase viscosity
• C. Reduce foaming
• D. Enhance odor control

Answer: (B)

Stickers act as adhesive agents in sprays, helping the formulation cling to plant surfaces. Their primary job is to increase the viscosity and create a tacky film, so droplets don’t wash off easily and more of the active ingredient stays on the leaf long enough to work. This retention on the leaf improves efficacy, especially under rain or on tough leaf surfaces. It’s different from spreaders, which are meant to help the droplet spread more broadly over a surface. Foaming control and odor control are handled by other types of additives, not the sticker. So the best fit is that stickers increase viscosity to keep the spray attached.