HIGHBUSH BLACKBERRY (RUBUS-ARGUTUS) CONTROL IN BAHIAGRASS (PASPALUM-NOTATUM)

A 3-yr study investigated highbush blackberry control in bahiagrass tu rf using selective herbicides. Triclopyr applied alone at greater than or equal to 0.56 kg/ha and in combination with other herbicides provi ded best (75 to 95%) control for up to 52 wk after treatment with mini mal damage to bahiagrass turf. Triclopyr formulations (3A vs 4EC) prov ided similar highbush blackberry control and bahiagrass tolerance, The addition of either 2,4-D, dicamba, hexazinone, or sulfometuron to tri clopyr provided slightly better blackberry control, but increased bahi agrass turf damage. Fluroxypyr applied at 0.14 to 0.28 kg/ha provided 60 to 80% control of highbush blackberry 12 WAT. Glyphosate and glufos inate treatments provided unacceptable highbush blackberry control and /or unacceptable bahiagrass turf injury, The addition of oxadiazon fur residual control of subsequent highbush blackberry emergence was inef fective.