Pond Weed Control
There are 4 broad types of pond weed control:
The steps essential for pond weed control are:
The best pond weed control is prevention. Prevention can be achieved by pond site selection, proper pond construction. Edges of new and existing ponds should be deepened to minimize shallow water. Proper management of the watershed will reduce silting and nutrient build-up.
The grass carp will control submerged weeds with tender succulent vegetation. The stocking rate should be 10-15 per surface acre of the pond. You should stock at least 10-12 grass carp to prevent predation from bass. Be careful not to over-stock the pond. If complete control occurs, you may experience intense algae and plankton populations.
Aquatic herbicides are registered for very specific uses. If you decide to use chemical weed control you must first accurately identify the problem weeds in the pond. If you have pond scum cause by filamentous algae or chara, you will need to use copper sulfate algaecides or Aquathol.. Floating weeds, like Duckweed or Watermeal, require Sonar or Diquat/ Weedtrine D. If you have submersed weeds, like Coontail or Watermilfoil, you may have success with 2,4-D or you may need to use Diquat, Aquathol or Sonar. Marginal plants, like Cattails, smartweeds or young trees require Rodeo. 2,4-D may work for marginal plants. Be sure to read and follow label directions for proper use of any chemical control. Improper use may cause fish kill.