By

Keywords.Places.Yuba County.Oregon House.Speer's Pond, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Sonar, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1998

Keywords.Activities.Herbicide Application Methods.Spraying, Keywords.Activities.Herbicides.Vapam, Keywords.Photographers.A Posadas, Keywords.Places.San Diego County.Murray Reservoir.Vapam Test Plots, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Vapam, Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.Time Elapsed.12 days, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1981

Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Sonar, Keywords.Weeds.Hydrilla (Hydrilla verticillata).Tubers and Specimens, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1987

Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Sonar, Keywords.Weeds.Hydrilla (Hydrilla verticillata).Tubers and Specimens, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1987

Keywords.Photographers.R A O'Connell, Keywords.Places.Calaveras County.Bear Creek.Hesseltine Pond, Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Sonar, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1996

Keywords.Photographers.R A O'Connell, Keywords.Places.Calaveras County.Bear Creek.Hesseltine Pond, Keywords.Weeds.Coontail (Ceratophyllum demersum), Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Sonar, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1996

Keywords.Places.Imperial County, Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Removal, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1988

Keywords.Places.Imperial County.Sheldon Reservoir, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Weedtrine, Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.Time Elapsed.3 weeks, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1986

Keywords.Activities.Filling Lake, Keywords.Places.Sonoma County.Spring Lake, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Hydrilla (Hydrilla verticillata).After Treatment.By.Diuron, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1985