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Aquatic weeds in ponds or lakes used as sources for irrigation water can be controlled by physical removal, biological control, or herbicides. The method, or combination of methods, used will depend on factors such as target weeds, non-target plants, and what the water is used to irrigate. Physical removal can be accomplished manually or with machinery. It is time consuming , expensive and normally used alone if other methods are not feasible. However, a certain amount of physical removal may be necessary in combination with the use of biological control and herbicides. more...
Jack M. Whetstone (revised by L.B. McCarty)