. Bulletin. Natural history; Natural history. 380 Illinois Natiibal History SrR\-Ey Bulletin TABLE VII Per Cent Infestation by the Hessian Fly and Wheat Yields (Bushels per Acre) RANDOLPH COUNTY 1919—1927 Date of seeding®^* Sept. 22-26 Sept. 27— Oct. 1 Oct. 2—6 Oct. 7—11 Oct. 12—16 Oct. 17—21 Infestation November, 1919. 1920 Yield Infestation November. 1920. 1921 Yield Infestation November, 1922 Yield Infestation November, 1922. 1923 Yield 1923. Infestation November, 1924 Yield. Infestation No\ember, 1924. 1925 Yield Infestation November, 1925. 1926 Yield Infestation November, 1926. 192
. Bulletin. Natural history; Natural history. 380 Illinois Natiibal History SrR\-Ey Bulletin TABLE VII Per Cent Infestation by the Hessian Fly and Wheat Yields (Bushels per Acre) RANDOLPH COUNTY 1919—1927 Date of seeding®^* Sept. 22-26 Sept. 27— Oct. 1 Oct. 2—6 Oct. 7—11 Oct. 12—16 Oct. 17—21 Infestation November, 1919. 1920 Yield Infestation November. 1920. 1921 Yield Infestation November, 1922 Yield Infestation November, 1922. 1923 Yield 1923. Infestation November, 1924 Yield. Infestation No\ember, 1924. 1925 Yield Infestation November, 1925. 1926 Yield Infestation November, 1926. 1927 Yield 00 100 99 26 8 13 35 39 18 9 16 23 8 0 29 1 20 0 7 0 13 0 4 19 0 0 0 0 0 0 0 2 0 3.').0 0 4 0 0 0 0 Average Infestation. Average Yield 43 28 19 4 3 1 Sepi-ei-ie\ [s<!f,teT-Oct/~\ | OetZ-6. Fig. 11. Graphs showing average yield and average in- festation for experimental plots in Randolph 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
