. Bulletin of the Department of Agriculture. Agriculture. 46 BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. PUP^ OF THE SPRING BROOD. Time of pupation.—The daily observations of the time of pupa- tion of the wintering larvae are tabulated in Table XXIX and pre-. FiG. 17.—Diagram of life history of the codling moth in the Grand Valley of Colorado, 1915. sented graphically in figure 18. Reference to this table will show that 508 larvae were under observation and that the earliest pupation occurred April 16 and the latest June 12, the period thus covering about two months. The maximum pupati
. Bulletin of the Department of Agriculture. Agriculture. 46 BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. PUP^ OF THE SPRING BROOD. Time of pupation.—The daily observations of the time of pupa- tion of the wintering larvae are tabulated in Table XXIX and pre-. FiG. 17.—Diagram of life history of the codling moth in the Grand Valley of Colorado, 1915. sented graphically in figure 18. Reference to this table will show that 508 larvae were under observation and that the earliest pupation occurred April 16 and the latest June 12, the period thus covering about two months. The maximum pupation took place May 6, when 37 individuals pupated. On April 28, 36 larvae transformed to pupae, and if weather conditions had con- tinued normal for the remainder of the month, it is probable that the maximum pupation would Fig. 18.—Time of pupation of spring have occuiTed about May 1; but, brood of the codling moth, Grand ^^^ ^^-jj y^^ ^^^^ -^^ ^j^^ graph, the Junction, Colo., 1016. ^ '•. 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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