Aquatic Plant Control Research Program: Chemical Control of Hydrilla in Flowing Water: Herbicide Uptake Characteristics and Concentrations versus Exposure

摘要

Most alternative techniques for management of hydrilla (Hydrilla verticillata (L.f.) Royle) have been developed for lentic systems, and thus their use in flowing water is usually limited. Control of hydrilla in flowing water is difficult because the herbicide may be in contact with the plant for a matter of hours or minutes before being swept away by the current. This study was conducted to develop strategies for hydrilla control in flowing water. Specific objectives were: (a) to determine the susceptibility of the monoecious hydrilla to registered aquatic herbicides, (b) to provide information on the minimum contact time required for control of monoecious and dioecious hydrilla with diquat, endothall, and fluridone, and (c) to examine time-course uptake characteristics of these herbicides by hydrilla. All results presented in this report were from laboratory studies and should be verified and field trials in natural environments.