Team Global · Science · 2026-08-30
In 2001, USDA researchers released salvinia weevils in Texas and Louisiana; by
Discover how USDA's release of salvinia weevils has dramatically reduced giant salvinia infestations in Texas and Louisiana without chemical intervention. Learn about the effectiveness and longevity of biological control methods in managing this invasive water weed. In 2001, USDA researchers released salvinia weevils in Texas and Louisiana; by 2003, weed cover had fallen near release sites while untreated controls stayed choked.
Why it matters. This biological control method demonstrates how introducing natural predators can successfully and sustainably manage invasive aquatic weeds without the use of harmful chemicals.
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