Tuesday, September 7th, 2021
The webinar is on September 15th, 2021, at 2 p.m. ET, 1 p.m. CT, 12 p.m. MT, 11 a.m. PT
Flowering rush (Butomus umbellatus L.) is becoming a widespread invasive weed in the waters of the West and Midwest. Flowering rush causes a number of nuisance problems including obstruction shorelines, reducing irrigation flow, and providing habitat for nonnative warmwater fish. This species is distinctive in appearance, though is often confused with other emergent and submersed species. Flowering rush occurs as both diploid and triploid biotypes, but western US populations are largely the triploid biotype. Recently published research has identified six genotypes in the US, but one genotype in particular dominates in the western US. While an international group is actively looking for biological control agents, at this time no insect biocontrol agents are available.
John D. Madsen, PhD., is Research Biologist with the US Department of Agriculture, Agricultural Research Service, Invasive Species and Pollinator Health Research Unit in Davis, California, USA. His work focuses on the biology, ecology and management of aquatic plants, particularly nuisance-forming species. You can read more about Dr.