A coalition of agencies dedicated to fighting the infestation of giant salvinia on Caddo Lake has officially approved construction of a mesh barricade on the lake to catch wind-blown weeds and agreed to come up with funding, Jack Canson of Greater Caddo Lake Association said Tuesday.

A budget committee Tuesday meeting at Marshall's City Hall between representatives from various agencies resulted in a decision to take up where the $20,000 given by Cypress Valley Navigation District has left off.