ABSTRACT
Aquatic weeds are those unwanted plants which grow in water and complete at least a part of their life cycle in water. Many aquatic plants are desirable since they may play temporarily a beneficial role in reducing agricultural, domestic and industrial pollution. Letting a crop of plants grow in a lake or pond and then k i l l ing it over a period of time, and consequently releasing nutrients back into the water, may help in fish production. However, many aquatic plants are considered weeds when they deprive human be ings of all facets of efficient use of water and cause harmful effects, some of which are discussed below.
