Subject
- Agricultural pests -- Control -- Congresses388
- Apples -- Diseases and pests132
- Pears -- Diseases and pests125
- Codling moth -- Control57
- Insecticides -- Research53
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Pear psylla -- Control28
- Peach -- Diseases and pests17
- Grapes -- Diseases and pests -- Control -- Oregon16
- Fruit trees -- Diseases and pests -- Control15
- Spraying and dusting in agriculture15
- Nut trees -- Diseases and pests -- Control14
- Spraying and dusting in agriculture -- Oregon14
- Almond -- Diseases and pests13
- Report (United States. Forest Service. Northern Region. Forest Pest Management)13
- Report (United States. Forest Service. Northern Region. Insect and Disease Management)13
- Vegetable gardening -- Oregon12
- Viticulture -- Oregon12
- Apple pandemis -- Control11