Studies on the Formulation of Selective Herbicide S-3552

Abstract

S-3552 has low solubility in organic solvents usually used as solvents for EC formulation. Therefore EC whose a. i. content is lower than 20% is only formulated with xylene and isophorone. Herbicidal activity of EC formulation, however, is superior to those of Flowable and WP formulations. Therefore increase of content of S-3552 in EC formulation is tried. It was found that S-3552 could be formulated into 30 EC formulation by using phenol as a cosolvent and choosing proper emulsifiers, which gave good low temperature stability, emulsion stability and storage stability. It also showed herbicidal activity as good as 10 EC and 20 EC of xylene/isophorone solvent.