688 STATE BOARD OF AGRICULTURE. 



9. Folsom, Donald and Sclmltz, E. S. Potato tipburn in northeastern 

 Maine. Phytopath. 12:36-37. 1922. 



10. Gillette, C. P. A few injurious insects and their remedies. Trans. 



la. Hort. Soc. 25 :102-106. 1890. 



11. Lathrop, F. H. Notes on three species of apple leafhoppers. Jour. 



Econ. Ent. 11:144. 1918. 



12. Ackerman, A. J. Two leafhoppers injurious to apple nursery stock. 



U. S. D. A. Bui. 805. 1919. 



13. Webster, K. L. Eggs of Empoasca mali. Jour. Econ. Ent. 1 :326-7. 



1908. 

 Insects of the year in Iowa. Jour. Econ. Ent. 2:211. 



1909. 



The apple leafhopper. Ta. Agr. Exj). Sta. 111. 1910. 



Potato insects. la. Agr. Exp. Sta. Bui. 155. 1915. 



14. Washbann, F. L. Egg laving of Enipoaisi-a mali. Jour. Econ. Ent. 



1:142-45. 1908. 



Notes on Empoasca mali. Jour. Econ. Ent. 2 :54-58. 1909. 



Further investigations on Empoasca mali. Jour. Econ. 



Ent. 3:162-104. 1910. 



15. Dudley, Jr., J. E. and Wilson, H. F. Combat potato leafhopper with 



bordeaux. Wis. Agr. Exp. Sta. Bui. 334. 1921. 



16. Stewart, F. C, French, G. T. and Sirrine, F. A. Potato spraying 



experiments in 1910. N. Y. Agr. Exp. Sta. Bui. 338. 1911. 



