. Annals of applied biology. Biology, Economic; Biochemistry. 180 Bionomics of Cryphalus abietis the branch round which the burrow is cut happens to be a fairly strong one it may be only partially eaten round. On the other hand, if the branch be weak, as is very often the case, the burrow completely girdles the branch. The length of the gallery varies. When the mother gallery is short it is broader, when long it is usually narrower. On an average the distance between the beginning of the mother gallery and its ter- mination, measured along its course, is about | inch in length, while in inch.
. Annals of applied biology. Biology, Economic; Biochemistry. 180 Bionomics of Cryphalus abietis the branch round which the burrow is cut happens to be a fairly strong one it may be only partially eaten round. On the other hand, if the branch be weak, as is very often the case, the burrow completely girdles the branch. The length of the gallery varies. When the mother gallery is short it is broader, when long it is usually narrower. On an average the distance between the beginning of the mother gallery and its ter- mination, measured along its course, is about | inch in length, while in inch. breadth it measures from \ 10. Fig. 8. Typical brood galleries of C. abietis on a branch of Silver Fir (Abies pectinata ). Note how the mother gallery is cut round a smaller branch (E.). «.= beginning of mother gallery; ;mother gallery widened in parts through the feeding of the young larvae; larval gallery; c^.= pupal bed; ii\ = base of smaller branch round which mother gallery is cut. The larval galleries naturally run almost at right angles to the mother gallery, radiating out from it on all sides. Some of these larval galleries. 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 Association of Applied Biologists; Association of Economic Biologists. [Wellesbourne, Warwick, etc. ] Association of Applied Biologists [etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiochem, bookyear1919
