Pistia stratiotes L. (Araceae) is an aquatic floating macrophyte, supposed original from South America and India subcontinent. Spread all over the world as ornamental, is now an invasive species in many countries in Africa, Asia, Australia and North America. It impedes the access and use of the water, the recreation and it is an aggressive weed in natural ecosystems. In Argentina is a weed in lagoons, urban ponds, moorings, etc.
The aquatic weevil Neohydronomus affinis (Coleoptera: Curculionidae), and the planthopper Lepidelphax pistiae (Hemiptera: Delphacidae) are two effective natural enemies of P. stratiotes studied at FuEDEI.
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