. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 82 ffl laOH \i. "< « i BRBN< i \ the date of apph i>f proper quarantine dates. RA8RBM MM I IfGL v\n AKEA In order t" presi al idea of t nal occurrei nbualis in N- w England, a graph has been ted (ii^r. Hi based upon the average obtained from actual observaf AUGUST SEPTEMBEROCTOBER £ * * 9 * » 9 «. Fig. 41.—Seasonal occurrence of the European corn bonr in New England. Averaged from data obtained during the period 1918 t" 1922, Inclui in the t i * -1 * i and from insectary reafings during the five
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 82 ffl laOH \i. "< « i BRBN< i \ the date of apph i>f proper quarantine dates. RA8RBM MM I IfGL v\n AKEA In order t" presi al idea of t nal occurrei nbualis in N- w England, a graph has been ted (ii^r. Hi based upon the average obtained from actual observaf AUGUST SEPTEMBEROCTOBER £ * * 9 * » 9 «. Fig. 41.—Seasonal occurrence of the European corn bonr in New England. Averaged from data obtained during the period 1918 t" 1922, Inclui in the t i * -1 * i and from insectary reafings during the five-year period from 1918 to L922, inclusive Prior to 1922 n systematic Held examination- wore made with this particular object in view, consequently it was necessary in the instance of some of the stages, notably the first occurrence of e:_r:_r- and larvae in certain years of the five-year period, to depend upon insectary records, or id compute the first occurrence from the known presence and duration of the preceding Mai_r and larvae in the Held during this. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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