1979

Keywords.Equipment.Fish Seining Electroshock Machine, Keywords.Photographers.D Dixon, Keywords.Places.Imperial County.All-American Canal, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1979

Keywords.Activities.Herbicide Application Methods.Aerial Application (Helicopter), Keywords.Places.Imperial County, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1979

Keywords.Photographers.M Keffer, Keywords.Places.Nevada.South Hills, Keywords.Weeds.Knapweed.Diffuse Knapweed (Centaurea diffusa), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1979

Keywords.Activities.Biocontrol, Keywords.Animals.Insects.Klamath Weed Beetle (Chrysolina quadrigemina), Keywords.Weeds.Klamathweed (Hypericum perforatum), Keywords.Weeds.Ratings.C Rated, Keywords.Year.1979

Keywords.Activities.Biocontrol, Keywords.Animals.Insects.Klamath Weed Beetle (Chrysolina quadrigemina), Keywords.Weeds.Klamathweed (Hypericum perforatum), Keywords.Weeds.Ratings.C Rated, Keywords.Year.1979

Keywords.Activities.Herbicide Application Methods.Spraying, Keywords.Photographers.J P Clark, Keywords.Weeds.Hydrilla (Hydrilla verticillata), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1979