New Waves March 2011

Breaking news about water resources research and education in Texas

Caddo Lake project offers April 7 community meeting, blog and Facebook page

Caddo Lake project offers April 7 community meeting, blog and Facebook page To learn more about what is being done in the fight against an invasive plant, giant salvinia (Salvinia molesta), at Caddo Lake, plan to attend a community update meeting on Thursday, April 7 at 6 p.m. at the Karnack Community Center, 15593 FM 134 (Intersection of FM 134 and T.J. Taylor Ave) in Karnack.

In addition to the meeting, updates from the Caddo Lake Salvinia Eradication Project are now available online via a regularly updated blog and Facebook page.

Part of the Center for Invasive Species Eradication, the Caddo Lake Giant Salvinia Eradication project is working to advance management options for giant salvinia in Texas and other infected states, said Patrick Ireland, Texas AgriLife Extension Service assistant and project coordinator for the center.

To stay current on recent and upcoming events, visit the project’s blog, which contains in-depth updates on activities at Caddo Lake. The Facebook page offers frequent, brief updates and will enable easier organization of volunteer efforts and events in the Caddo Lake area. The page provides readers the ability to view upcoming events and photo albums of past activities, he said.

The project is conducting experiments using the salvinia weevil, giant salvina’s only biological enemy, that involve propagating salvinia weevils for release on Caddo Lake. Pictures of the weevil rearing facility are posted on the Facebook page along with videos made by Texas Parks and Wildlife Department about giant salvinia invading Caddo Lake.

Recent topics featured in the blog and Facebook page include weevil counting using berlese funnels, refilling weevil/giant salvinia rearing tanks and conducting the Caddo Lake weevil overwintering study. Berlese funnels were used to estimate the density of weevils and researchers were able to measure how many salvinia weevils were present in an area of giant salvinia.

“The refilling of the weevil rearing tanks began in early February and the well water was replaced with actual Caddo Lake water because the well water chemistry was too far from what giant salvinia prefers,” Ireland said.

For more information about the Caddo Lake Salvinia Eradication Project, visit

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