Abstract

Two separate experiments were conducted over a 3-year growing period to examine control of grass and broadleaf weeds in three cultivars of Ilex. The effect of application timing and number of applications of a tank mixture of Surflan (oryzalin) + Princep (simazine) [2.2 + 0.9 kg ai/ha (2.0 + 0.75 lb ai/A)] were examined in the first study. Maximum season-long control was obtained with any treatment that contained a minimum of two herbicide applications, with the first applied in March and the second in July. The performance of various 2-way combinations of Surflan, Princep and Goal was examined in the second experiment. Acceptable weed control was obtained with any combination that contained broadleaf and grass-active herbicides. Inspection of data across both studies indicates that timing of application is of greater importance than the specific herbicides used.