Subject
- Agricultural pests -- Control -- Congresses78
- Insecticides -- Research69
- Highway research -- Congresses11
- Pears -- Diseases and pests11
- Road construction -- Congresses10
- Pear psylla -- Control8
- Codling moth -- Control6
- Engineering -- Research -- Oregon6
- Canola -- Diseases and pests5
- Strawberries -- Diseases and pests4
- Acaricides -- Research3
- Agricultural chemicals -- Foliar application3
- Blueberries -- Diseases and pests3
- Colorado potato beetle -- Control3
- Flea beetles -- Control3
- Aphids -- Control2
- Apples -- Diseases and pests2
- Black vine weevil -- Control2
- Cotton aphid -- Control2
- Hessian fly -- Control2