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- Eat many types of aquatic vegetation
- Safe and cost-effective weed control
One of the most common problems that lake owners must deal with each spring and summer is unwanted aquatic vegetation. These aquatic weeds can be controlled chemically with aquatic herbicides, or biologically by introducing a plant-eating fish.
The most common and effective biological control is the grass carp, or white amur, an exotic plant-eating fish. This fish can eat 100% of its body weight in vegetation each day.

Research conducted at universities throughout the Southeast has shown that stocking 10 to 15 grass carp per acre will control moderate weed infestations. Heavy infestations (where the majority of the lake is covered), requires 20 or more grass carp per acre.
Grass carp are available as either diploid or triploid (sterile) fish. Check with your state wildlife and fisheries agency to determine the legal requirements for grass carp.
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Seasonal Tips
Threadfin Shad Are Available Now!
 Sexually mature threadfin shad are now available from American Sport Fish Hatchery. Our hatchery ponds are full of healthy adult threadfin shad and we will begin our deliveries on June 15. These shad will spawn several times in your lake this summer. Many years ago, most of the lakes and ponds in the southeast were stocked during the summer using this technique. Most lake managers in East Texas continue to stock threadfin shad during the summer, with good success. If you are not observing schools of threadfin shad on the surface of your lake in the late afternoon, you need to add them to your lake. If you miss a threadfin shad spawn this year, you may reduce food production for your bass for the next two years.
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