SALVINIA (Salvinia molesta)

Salvinia is a perennial, free-floating aquatic plant native to Brazil.   It has become established in Queensland after escaping from aquariums.  It forms dense mats that clog water bodies including slow-moving fresh and brackish streams, or still water ponds.  This affects water quality, water flow, wildlife, irrigation areas and recreational activities.

Salvinia leaves are bright green, oval in shape and about 2 cm in width.  Young leaves are flat on the water surface whereas older leaves bend and become pairs along the stem.  No flowers are produced.

All species of salvinia are declared plants in Queensland and cannot be sold or introduced into the state.  People carelessly emptying aquariums and ponds into waterways spread salvinia, and it is suspected that some is actually farmed in natural waterways for harvest and sale.

Do not allow salvinia to establish. Biological control options (a weevil) are available from collection sites (contact your local Land Protection Officer).  Two herbicides are registered for the control of salvinia in Queensland, caldec (AF 100®) and diquat (Reglone®).  However please read the label carefully before use of these products.