. Bulletin. Natural history; Natural history. The Hessian Fly and the Win^ix Crop 07r oFScsaite '^eptl-S\ Uepf7-//\ \Seot/e-/6\ \SefStn-l/\ '^\ teyr^Z-Ag) \ocf:l-g\ M I I 1 Yso 371. Fig. 5. Graphs showing average yield and average infesta- tion for experimental plots in Winnebago and Boone counties. and Bureau Counties The experiment which was started in Bureau County in 1017 has been continued in LaSalle County since 1S120. The work has been done on three different farms. ]Mr. L. C. Rinker, of Grand Ridge, who has co- operated with the Natural History Survey for several years i

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. Bulletin. Natural history; Natural history. The Hessian Fly and the Win^ix Crop 07r oFScsaite '^eptl-S\ Uepf7-//\ \Seot/e-/6\ \SefStn-l/\ '^\ teyr^Z-Ag) \ocf:l-g\ M I I 1 Yso 371. Fig. 5. Graphs showing average yield and average infesta- tion for experimental plots in Winnebago and Boone counties. and Bureau Counties The experiment which was started in Bureau County in 1017 has been continued in LaSalle County since 1S120. The work has been done on three different farms. ]Mr. L. C. Rinker, of Grand Ridge, who has co- operated with the Natural History Survey for several years in this work, has been very careful in his handling of the fields, ilost of the seedings were made between September T and October 6. Date or 3££d//vs. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division

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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory