Management of antelope grass (Echinochloa pyramidalis) in sugarcane water ways.
Echinochloa pyramidalis is one of the most troublesome weeds in the aquatic system of the Guyana Sugar Corporation. Since its discovery at Blairmont Estate in 1982, the weed increased steadily until 1995. Several herbicides were used up to 1995 with varying degrees of success. The introduction of Arsenal (imazapyr) at 121 g a.i./ha made a significant impact in the management of this weed. This practice coupled with an ecological method using Leersia hexandra (savannah grass) as a replacement species offered sustainable control of this troublesome weed. The successive strategies developed at Blairmont Estate and the impact of the integrated management programme are discussed.