. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CODLING MOTH IN COLORADO. 77 to the appearance of the black spot was days, maximum 9 days, and minimum 6 days; the average incubation period was days, maximum 11 days, and minimum 7 days. LiARVJE OF THE Brood. Thied. ^£/=71^MB£ff Fig. 29.—Time of deposition of third-brood eggs of the codling moth, Grand Junction, Colo., 1916. Time of hatching.— The larvae o f t h e third brood com- menced to hatch Au- gust 20, as will be noted in Table LIV and figure 30. Hatch- ing continued daily, with some exceptions, up to
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CODLING MOTH IN COLORADO. 77 to the appearance of the black spot was days, maximum 9 days, and minimum 6 days; the average incubation period was days, maximum 11 days, and minimum 7 days. LiARVJE OF THE Brood. Thied. ^£/=71^MB£ff Fig. 29.—Time of deposition of third-brood eggs of the codling moth, Grand Junction, Colo., 1916. Time of hatching.— The larvae o f t h e third brood com- menced to hatch Au- gust 20, as will be noted in Table LIV and figure 30. Hatch- ing continued daily, with some exceptions, up to September 21, the period thus hav- ing a duration of about one month. The larva? were hatching in maximum numbers on September 4, and on this date 188 hatched. A large proportion of the eggs, however, hatched previous to this, namely from August 22 to 29. ing perio d.—The study of the feeding period of larva? of the third brood, stock-jar method, in- cluded 331 1 a r v a?. The first larva? to hatch entered the fruit August 20, while the last larva? entered the fruit Sep- tember 21. None of the larva? that en- tered the fruit after ^September 11 reached maturity. It will be noted in Table LV that the average feeding period of the larva? under observation was days, maximum 68 days, and minimum 20 days. 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.
Size: 1845px × 1355px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
