. Bulletin of the Department of Agriculture. Agriculture. 112 BULLETIN 932, V. S. DEPAETMENT OF AGRICULTURE. REVIEW OF SEASONAL-HISTORY STUDIES OF THE CODLING MOTH IN 1915 AND 1916. A generalized review of the seasonal-history studies of the codling moth is given graphically in figures 17 and 36 for the seasons of 1915 and 1916 respectively. The curves represent approximately the beginning, ending, and crest of activity of the more important biological stages of the insect. /9f=/>IL MlRY MM£ JULY iRUGOST SEPTEMBER JCTOBE/? 1 s loisiciSM s 10 isio isjo s 10 fs BoisM sioissoes s, lyOl-EM
. Bulletin of the Department of Agriculture. Agriculture. 112 BULLETIN 932, V. S. DEPAETMENT OF AGRICULTURE. REVIEW OF SEASONAL-HISTORY STUDIES OF THE CODLING MOTH IN 1915 AND 1916. A generalized review of the seasonal-history studies of the codling moth is given graphically in figures 17 and 36 for the seasons of 1915 and 1916 respectively. The curves represent approximately the beginning, ending, and crest of activity of the more important biological stages of the insect. /9f=/>IL MlRY MM£ JULY iRUGOST SEPTEMBER JCTOBE/? 1 s loisiciSM s 10 isio isjo s 10 fs BoisM sioissoes s, lyOl-EMBER S .0 IS !0 ZS X ^^^^^ — IITH. PUF¥ITION OF SPRING Fig. 36.—Diagram of life history of the codling moth in the Grand Valley of Colorado, 1916. Pupation of 82)rlng brood.—In 1915 pupation commenced April 14, reached its maximum May 12, and ended June 8; in 1916 the earliest pupation took place April 16, was at its height May 6, and ceased June 12. Emergence of spring-hrood moths.—The first moth of the spring brood (1915) emerged May 12, the maximum emergence occurred May 24, and the last moth of this brood issued June 29. In 1916 the first spring-brood moth appeared May 10, the maximum emer- gence took place May 24, and the last moth issued June 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 Department : Supt. of Docs. , Govt. Print. Off.
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