Control of Huisache with Soil Applied Herbicides

Abstract

Soil active herbicides were investigated for control of huisache. Tebuthiuron and bromacil were usually more effective than other herbicide sprays when applied to the soil surface or subsurface in bands spaced 4 ft apart. Karbutilate and prometone were intermediate in effect, whereas picloram, dicamba, 2,3,6-TBA, and diuron were relatively ineffective in the Houston black clay soil used in this study. Subsurface sprays were usually superior to surface treatment for all herbicides investigated. Spacing of tebuthiuron granules in bands at 6, 10, 15, or 20 ft apart showed little difference in control of huisache at 2 or 4 lb/acre. Placement of granular herbicides in bands was superior to broadcast application at 2 lb/acre, but not at 4 lb/acre.