sentences:  Physical control is performed by land-based machines such as bucket cranes, draglines, or boom or by water based machinery such as aquatic weed harvesters, dredges, or vegetation shredder.Mechanical removal is seen as the best short-term solution to the proliferation of the plant.A project on Lake Victoria in Africa used various pieces of equipment to chop, collect, and dispose of of water hyacinth in a 12-month period.