Identifying the type or
species of plant(s) to be controlled is the first step
in implementing a management strategy. You may choose to
make the identification yourself by using the pictures
and descriptions on this website or have the growth
examined by a trained biologist. Personnel from Fish and
Game, Soil Conservation Service, Department of Natural
Resources, etc. may be able to assist.
Aquatic plants are classified
into simplified categories based upon their growth form
and location in the environment. The identification
section of this website is divided into the following plant
groupings:
Become familiar with the
definition of each of these groupings in order to
determine the section where your plant specimen may be
found.
When collecting plants to be
identified, note their location in the lake or pond
(i.e. submerged, floating, emergent) and refer to the
proper section in this book. Use the illustrations,
written descriptions and geographical distribution maps
to determine species. For algae, determine type
(filamentous, planktonic, or attached-erect forms). Take
particular note of location and structure of leaves,
seeds and flowers when comparing plants to pictures.
Noting relative abundance of each type as to whether
they are abundant, common or scarce will assist in
determining the proper control product(s).
Following is a pictorial
guide and written description of aquatic plants commonly
found in lakes and ponds. Recommended and alternative
chemical choices are given for controlling each type
based upon label recommendations and many years of
actual field experience. Numerous factors have been
considered including human and environmental safety,
effectiveness, ease of application, and cost. Only
aquatic chemicals properly registered with the U.S.
Environmental Protection Agency and the majority of
state conservation commissions are recommended.
Nevertheless, it is prudent to clear use of any product
with your proper government agency before
applying.
Descriptions and pictures are from the book "How to Identify and Control Water Weeds and Algae", Edited by James C. Schmidt, 5th edition revised 1998, copyright 1976 Applied Biochemists.
