. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 28 BULLETIN 1235, IT. S. DEPARTMENT OF AGRICULTURE. Table 23.—Length of feeding period of larvse of the first brood of the codling moth, bagged-fruit method, Yakima, Wash., 1920. Date of entering fruit. Num- ber of larvae. Feeding period in days. Date of entering fruit. Num- ber of larvse. Feeding period in days. Average. Maxi- mum. Mini- mum. Average. Maxi- mum. Mini- mum. June 24 26 27 28 29 9 5 3 4 10 26 23 26 19 24 18 16 15 17 14 June 30 July 1 2 3 4 14 4 4 20 2
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 28 BULLETIN 1235, IT. S. DEPARTMENT OF AGRICULTURE. Table 23.—Length of feeding period of larvse of the first brood of the codling moth, bagged-fruit method, Yakima, Wash., 1920. Date of entering fruit. Num- ber of larvae. Feeding period in days. Date of entering fruit. Num- ber of larvse. Feeding period in days. Average. Maxi- mum. Mini- mum. Average. Maxi- mum. Mini- mum. June 24 26 27 28 29 9 5 3 4 10 26 23 26 19 24 18 16 15 17 14 June 30 July 1 2 3 4 14 4 4 20 28 24 24 15 17 18 20 Total number of larvse 57 Average length of feeding period in days Maximum length of feeding period in days 28 Minimum length of feeding period in days 14 Length of cocooning period.—The cocooning period, or the total period from the time the larva leaves the fruit until it pupates, aver- aged days for 235 transforming individuals. (See Table 24.) Table 24.—Length of cocooning period of transforming codling moth larvse of the first brood, Yakima, Wash., 1920. Larvse left fruit. Num- ber of larvse. Cocooning period in days. Larvse left fruit. Num- ber of larvse. Cocooning period in days. Average. Maxi- mum. Mini- mum. Average. Maxi- mum. Mini- mum. July 6 1 4 4 July 24 4 7 4 7« 3 5 4 25 8 15 4 8 4 7 4 26 5 14 4 9 7 6 . 5 27 6 13 4 10 11 7 5 28 3 8 5 11 12 6 5 29 6 8 4 12 9 6 4 30 4 8 3 13 16 5 4 31 3 4 4 14 8 8 4 Aug. 1 5 11 4 15 14 15 3 2 3 5 4 16 14 7 4 3 1 5 5 17 10 6 3 4 1 10 10 18 20 9 3 6 1 4 4 19 16 16 4 7 1 5 5 20 11 10 5 11 1 4 4 21 22 10 6 7 10 4 4 Total. 235 22 3 23 11 22 4 26. 9 /4- /9 24- 29 c? 8 ' /3 /8 Fig. 16.—Pupation of the first brood of the codling moth at Yakima, Wash., Please note that these images are extracted from scanned page images that m
Size: 2104px × 1188px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
