The response of nine protea species to spray applications of fluazifop‐p

Abstract

The phytotoxicity of two sequential spray applications of the grass herbicide, fluazifop‐p, was determined on nine protea species. Fluazifop‐p, at 2.3, 4.5, and 18.0 g a.i./litre, was sprayed onto mature protea plants and a grassy weed, kikuyu grass (Pennisetum clandestinum Hochst. ex Chiov.), in a spray‐to‐drip application. There was no unacceptable crop injury from the 2.3 and 4.5 g a.i./litre spray applications. Unacceptable injury was recorded on three proteas (Banksia prionotes Lindley., Banksia victoriae Meisn. and Banksia speciosa R. Br.) with the 18.0 g a.i./ litre treatment. Kikuyu grass was controlled with fluazifop‐p at 4.5 and 18.0 ga.i./l.