. Insects attacking fruit trees [microform]. Fruit; Insect pests; Insectes nuisibles; Fruits. 1< ge«ts, resembles in outline the shell of an oyster. Its ctlor is nearly the same u that of the bark on which it is fuund. This Scale is very common in all parts of the Province and attacks not only apple and other fruit trees, but also many shade and forest trees and many shrubs; apple trees, however, usually suffer Various stages of the Oyster-shell Scale: 4. The scale slightly enlarged on a twig. The little holes in the scales indicate where parasites einer:red. 1. Thi: female scale ver
. Insects attacking fruit trees [microform]. Fruit; Insect pests; Insectes nuisibles; Fruits. 1< ge«ts, resembles in outline the shell of an oyster. Its ctlor is nearly the same u that of the bark on which it is fuund. This Scale is very common in all parts of the Province and attacks not only apple and other fruit trees, but also many shade and forest trees and many shrubs; apple trees, however, usually suffer Various stages of the Oyster-shell Scale: 4. The scale slightly enlarged on a twig. The little holes in the scales indicate where parasites einer:red. 1. Thi: female scale very much enlarged, showing general shape. 5. A similar scale turned over to show the eggs beneath. The shrivelled body of the female herself is beyond the eggs at the small end. 2. A female removed from beneath the scale before she has laid her eggs. Note the briatle-llke mouth parts simi- lar to those of San Jos^ Scale. 3. A male scale. 6. Young larva, dorsal view. 7. Winged male. All except No. 4 much enlarged (after Sherman and Metcalfe). It is not nearly so prolific or so destructive as the San Jos4 Scale, and though it often kills individual branches, it comparatively rarely kills the whole tree. Badly infested trees are of course weakened and unable to bear good crops. Lifs History. The insect winters in the egg state, there being an average of between 40 and 50 white eggs under each female scale. The eggs hatch about the. 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 Caesar, Lawson, 1870-1952; Ontario. Dept. of Agriculture. Toronto : Dept. of Agriculture
Size: 1421px × 1759px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectpests, bookyear
