. Bulletin of the Department of Agriculture. Agriculture. Fig. 12.—First stage: I^arva showing first symptoms of sacbrood and presenting tlie dorsal view of tlie anterior tliird. Cap removed artificially. (Original.) This shade deepens somewhat during the stage, but does not become a deep yellow. Anterior third.—The lateral margins and extreme cephalic end of the an- terior third (fig. 12; PI. II, h, li) may have assimied, and frequently do as- sume, a more or less transparent ap- pearance (represented in the figure by shading). The position and the sur- face markings of the anterior thir
. Bulletin of the Department of Agriculture. Agriculture. Fig. 12.—First stage: I^arva showing first symptoms of sacbrood and presenting tlie dorsal view of tlie anterior tliird. Cap removed artificially. (Original.) This shade deepens somewhat during the stage, but does not become a deep yellow. Anterior third.—The lateral margins and extreme cephalic end of the an- terior third (fig. 12; PI. II, h, li) may have assimied, and frequently do as- sume, a more or less transparent ap- pearance (represented in the figure by shading). The position and the sur- face markings of the anterior third are approximately those of the normal larva. When a change in the position is observed, however, the extreme anterior end of the larva— the apex of this cone-like third—having settled somewhat, does not approach so near the roof of the cell as does that of a healthy larva. It is sometimes found also that this cone-like third is deflected more or less to one side or the other. Middle and 'positenor thirds.—The changes from the normal that have taken place in these two thirds are similar and can, therefore, be described together. The yellowish tint is here observed. The trans- verse ridges and furrows are still well marked (fig. 13). The trans- FiG. 13.—First stage: Ventral view of larva dead of sacbrood as seen from above and at an angle, giving a ventral view of all three thirds. Cap torn across. (Original.) I. 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.
Size: 1114px × 2243px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
