. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE CODLING MOTH IN THE YAKIMA VALLEY, 23 Table 18.—Length of the pupal stage of pupse. of the spring brood of the codling moth, Yakima, Wash., 1920. Date of pupation. Num- ber of pupae. Pupal period in days. Date of pupation. Num- ber of pupee. Pupal period in days. Average. Maxi- mum. Mini- mum. Average. Maxi- mum. Mini- mum. Apr. 3 12 13 14 15 16 17 18 19 20 22 23 24 25 26 27 28 29 2 1 1 1 1 2 2 3 6 5 7 3 11 14 15 8 6 33.
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE CODLING MOTH IN THE YAKIMA VALLEY, 23 Table 18.—Length of the pupal stage of pupse. of the spring brood of the codling moth, Yakima, Wash., 1920. Date of pupation. Num- ber of pupae. Pupal period in days. Date of pupation. Num- ber of pupee. Pupal period in days. Average. Maxi- mum. Mini- mum. Average. Maxi- mum. Mini- mum. Apr. 3 12 13 14 15 16 17 18 19 20 22 23 24 25 26 27 28 29 2 1 1 1 1 2 2 3 6 5 7 3 11 14 15 8 6 42 36 37 36 31 34 33 37 37 35 34 35 32 36 38 37 37 35 42 36 34 36 31 34 32 37 31 32 30 32 32 31 34 34 27 34 Apr. 30 May 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 4 2 4 4 5 5 3 1 3 2 2 1 3 1 1 1 3 32. CO 35 34 34 32 31 31 32 34 35 34 34 32 34 33 34 33 33 33 34 32 31 31 31 31 34 32 34 33 32 31 33 34 33 32 Total number of pupse 136 Average length of pupal stage in days Maximum length of pupal stage in days 42 Minimum length of pupal stage in days 27 MOTHS OF THE SPRING BROOD. Time of emergence.—Moths began emerging May 10, but the cold weather held them back, and the maximum period of emergence did not occur until May 25 to June 5, with a maximum of 115 moths on June 2, which was 12 days later than in 1919. Moths continued emerging until July 2. These records will be found in Figure /3 /8 28 <3 Pig. 13.—Emergence of the spring brood of moths of the codling moth at Yakima, Wash., 1920. Oviposition hy moths of the spring^ brood.—Oviposition records were obtained from 824 moths confined in cages of about 25 moths each, and tabulated in Table 19. The averages are cage and not indi- vidual averages. (See p. 68 for some individual averages.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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