Subject
- Agricultural pests -- Control -- Congresses15
- Insecticides -- Research9
- Aphids -- Control8
- Apples -- Diseases and pests3
- Cotton aphid -- Control3
- Agricultural pests -- Integrated control -- Research2
- Aphids -- Biological control2
- Apple aphid2
- Beneficial insects -- Oregon2
- Christmas tree growing -- Oregon2
- Colorado potato beetle -- Control2
- Green peach aphid -- Control2
- Spirea aphid2
- Tomatoes -- Diseases and pests2
- Woolly apple aphid -- Control2
- Worms -- Control2
- Agricultural chemicals -- Foliar application1
- Amphorophora1
- Amphorophora -- Control1
- Aphids1