Subject
- Agricultural pests -- Control -- Congresses388
- Apples -- Diseases and pests136
- Pears -- Diseases and pests125
- Codling moth -- Control57
- Insecticides -- Research55
- Pear psylla -- Control28
- Strawberries -- Diseases and pests22
- Douglas fir -- Diseases and pests20
- Potatoes -- Diseases and pests20
- Peach -- Diseases and pests19
- Wheat -- Diseases and pests19
- Beans -- Diseases and pests14
- Peppermint -- Diseases and pests14
- Almond -- Diseases and pests13
- Virus diseases of plants13
- Hops -- Diseases and pests12
- Apple pandemis -- Control11
- Cherry -- Diseases and pests11
- Onions -- Diseases and pests11
- Fruit -- Diseases and pests10