SUMMARY
Hydrilla was introduced into the United States about 35 years ago (ca. 1960). Because of
unique biological and physiological characteristics and an aggressive growth habit, hydrilla
has established itself in a wide range of aquatic habitats. Once established in a system it can
alter the environment detrimentally by replacing native aquatic vegetation and affecting fish
populations. Monetary losses occur when waterfront property values are reduced as a result of
these environmental impacts or when interference with boating access reduces recreational use
of the water body. In urban and agricultural situations hydrilla interferes with the movement of
water for drainage or irrigation purposes and again, monetary or property losses can result.
Through scientific research, innovative aquatic plant management programs, and educational
programs we have dealt with many of the challenges presented by this weed. However,
hydrilla management costs millions of dollars annually and many water resources are
diminished because of hydrilla infestations that cannot be remedied. Many challenges remain
and it is hoped that further advances in hydrilla management will be made in the years to
come.
LITERATURE CITED
Bagnall,