Integrating herbicide rates, coverage, and classical biological control insects (Megamelus scutellaris, Neochetina eichhorniae,and Neochetina bruchi) to manage Pontederia (Eichhornia) crassipes

•Managing invasive floating plants in Florida involves routine herbicide application.•Biocontrol insects can help control Pontederia crassipes with less herbicide needed.•Leaving refuges of untreated plants helps sustain biocontrol insect populations.