Ontario Sessional Papers, 1908, . carefully put on latein the spring when the buds are well swollen or are opening. (3) Whitewash. The trees must be sprayed twice, with an interval ofa few days between, with whitewash. This should be done as soon as theleaves fall in the autumn. Use 1 to 2 lbs. lime to 1 gal. water. Parasites.—The most common parasites are : (1) A tiny little mite, probablyTyroglyphus ma?ws, that preys both upon the adult and the eggs; (2) a small,yellowish chalcid fly, probably Aphelinus mytilaspidis, Le Baron, the larvaof which preys upon the eggs (scales perforated
Ontario Sessional Papers, 1908, . carefully put on latein the spring when the buds are well swollen or are opening. (3) Whitewash. The trees must be sprayed twice, with an interval ofa few days between, with whitewash. This should be done as soon as theleaves fall in the autumn. Use 1 to 2 lbs. lime to 1 gal. water. Parasites.—The most common parasites are : (1) A tiny little mite, probablyTyroglyphus ma?ws, that preys both upon the adult and the eggs; (2) a small,yellowish chalcid fly, probably Aphelinus mytilaspidis, Le Baron, the larvaof which preys upon the eggs (scales perforated by small, round holes havebeen parasitised by this kind of insect); (3) certain species of ladybird beetles,especially the twice-stabbed lady beetle (Chilocorus bivulnerus) Muls. Thisyear we found a pink fungus attacking the young scales, and on a mountainash tree, in Toronto, which was covered with scales, the pink fungus para-sitised and killed nearly all the scales on the tree. (See Plate D. Fig. 6.). 1907 EXTOMpLOGICAL SOClIiTY. 69. Fig. 25. Oyster-shell Barklouse {Lepidosaphes ulmi). (a) Adult female, back view,showing the two moulted skins at anterior end, and the bristles of the suckingtube; (&) adult female turned over, showing the insect at the anterior end and theeggs at the posterior end; (f) adult male scale, much smaller than female, with onfrmoulted skin at anterior end. The Scurfy Scale, Chionaspis furfura, (Fitch). Figs. 26 and 27. The Scurfy Scale, though widely distributed throughout Ontario, isseldom found in so great abundance as the Oyster-shell. Badly infestedtrees or other plants are very much weakened and not infrequently die as aresult. The mature female scale is somewhat of the shape of the Oyster-shellybut is much broader in proportion to its length, and is more properly describ-ed as pear-shaped, being 2-3 mm. long, 1-2 mm. wide in the broadest partand tapering rapidly to a fine point at one end. It is very slightly convexand is grayish white in c
Size: 1381px × 1810px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorontariolegislativeass, bookcentury1900, bookdecade1900
