19 results on '"Ball E."'
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2. The Correct Names of the Leafhoppers Infesting the Apple and Potato
3. Efficiency and Economy in Grasshopper Control
4. Problem of the Range Grasshopper
5. The Life Histories of Two Leafhoppers, a Study in Adaptation
6. Field Notes on Grasshopper Outbreaks
7. The Efficiency of the Driving Spray
8. The Distribution of the Beet Leaf-Hopper
9. The President's Address Economic Entomology—Its Foundations and Future
10. The Potato Leafhopper and Its Relation to the Hopperburn
11. Food Plants of some Arizona Grasshoppers
12. The Number Of Generations of the Beet Leafhopper Under Natural Conditions
13. Important Factors in the Spread and Control of American Foulbrood
14. Courses for the Post-Graduate Student of Entomology
15. What Per Cent of Tipburn is Caused by the Potato Leafhopper?
16. Is Arsenical Spraying Killing our Fruit Trees?
17. The Season's Work on Arsenical Poisoning of Fruit Trees
18. The Section of Horticultural Inspection
19. Spraying Apparatus for Orchard Insects
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