Subject
- Agricultural pests -- Control -- Congresses155
- Pears -- Diseases and pests65
- Apples -- Diseases and pests62
- Codling moth -- Control27
- Pear psylla -- Control20
- Apple pandemis -- Control10
- Pear psylla6
- Codling moth5
- Two-spotted spider mite5
- Two-spotted spider mite -- Control4
- Agricultural pests -- Integrated control2
- Apple aphid2
- Apple pandemis2
- European red mite -- Control2
- Spirea aphid2
- Codling moth -- Control -- Oregon1
- Earwigs1
- Hood River Valley (Or.)1
- Plum -- Diseases and pests1
- Pseudococcus maritimus1