Sagittaria (Sagittaria platyphylla (Engelmann) J.G. Smith) is an emergent aquatic weed that has invaded irrigation systems throughout northern Victoria and southern New South Wales. In earth irrigation channels and drains it impedes water flow, reducing hydraulic capacity and limiting the efficiency of modernised water delivery systems. Currently, there are limited effective control options for sagittaria. This paper describes a field trial to determine the effectiveness of winter applications of the herbicides endothal and diquat in controlling sagittaria, in static irrigation channels. Endothal provided excellent control of both the emergent and submerged forms of sagittaria during winter conditions. Diquat, with and without a gelling agent, was ineffective.
Cite this article as:
Clements, D., Dugdale, T.M. and Hunt, T.D. (2013) Determining the efficacy of the herbicides endothal and diquat on the aquatic weed sagittaria in irrigation channels. Plant Protection Quarterly 28(3), 85-87.