Comparison of Preemergence Herbicides in Spinach

Abstract

Spinach exhibited progressively increased injury and crop stand reduction with increasing rates of s-metolachlor and dimethenamid-p. At the lowest rate applied, s-metolachlor at 0.38 lb ai/A caused minimal injury at 10% and slight stand reduction compared to the untreated check. Dimethenamid-p injured spinach 25% at the lowest rate applied and significant stand reduction was observed at 0.5 lb ai/A or greater. At equivalent rates, dimethenamid-p was more injurious to spinach than s-metolachlor.