Subject
- Tansy ragwort -- Control5
- Tansy ragwort -- Biological control4
- Insects as biological pest control agents3
- Tansy ragwort -- Northwest, Pacific3
- Tansy ragwort -- Control -- Oregon2
- Tansy ragwort -- Control -- West (U.S.)2
- Weeds -- Control -- Northwest, Pacific2
- Cinnabar moth1
- Cinnabar moth -- Ecology1
- Cinnabar moth -- Environmental aspects -- Oregon, Western1
- Cinnabar moth -- Host plants1
- Cinnabar moth -- Parasites1
- Dichlorophenoxyacetic acid -- Oregon1
- Livestock poisoning plants -- Control -- Oregon, Western1
- Livestock poisoning plants -- Control -- West (U.S.)1
- Livestock poisoning plants -- Oregon, Western1
- Livestock poisoning plants -- West (U.S.)1
- Nosema1
- Noxious weeds -- Control -- Oregon1
- Plant competition1