Subject
- Agricultural pests -- Control -- Congresses179
- Pears -- Diseases and pests79
- Apples -- Diseases and pests66
- Codling moth -- Control32
- Pear psylla -- Control24
- Apple pandemis -- Control10
- Pear psylla6
- Codling moth5
- Two-spotted spider mite5
- Two-spotted spider mite -- Control5
- European red mite -- Control3
- Agricultural pests -- Integrated control2
- Apple aphid2
- Apple pandemis2
- Spirea aphid2
- Codling moth -- Control -- Oregon1
- Earwigs1
- Hood River Valley (Or.)1
- Plum -- Diseases and pests1
- Pseudococcus maritimus1