A spreader-sticker is a special kind of material you can add to your spray mixture. The purpose of a spreader-sticker is to increase the adhesion of fungicides to plant surfaces, as well as help to obtain better coverage. Since these products are not water soluble, the fungicide tends to be more resistant to rainfall wash-off. The sticker helps keep the fungicide stay put on your plants. This comes from the spreader component of the spreader-sticker material.
Spreaders reduce surface tension of spray droplets.
This means the fungicide droplets, after hitting plant surfaces, are able to spread out and thus provide better coverage. If you have questions about your plant disease control program, please feel free to check with the County Extension Office. Mississippi State University is an equal opportunity institution. Recommendations on this web site do not endorse any commercial products or trade names.