A wingless or ‘apterous’ form of the water hyacinth planthopper (Megamelus scutellaris) uses its needle-like mouthparts to feed on leaf tissue of water hyacinth (Eichhornia crassipes). Water hyacinth, native to South America,  floats on the water surface and is one of the most widespread and damaging aquatic invasive plants in California and across the southern U.S.

Conducting Research

The weevil, Neochetina eichhorniae, is a biological control agent introduced against the invasive aquatic weed, water hyacinth, Eichhornia crassipes.

photo by Anthony King 2017.

Flowering rush

(Butomus umbellatus L.)

Flowering rush is an invasive plant to lakes, rivers, and irrigation canals in Montana, Idaho, and Washington. USDA ARS is examining the seasonal growth cycle and approaches to management.