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. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. jyo7 KNTOMOLOGICAL SOCIETY. 57 '.^vS tthSftn. -.--t^^^^pl^ /'l^.. 'j#>rr... ii /?m ,g^fc:; Fig. 15. Two enemies of the San Jose Scale, (a) Beetle; (6) larva; (c) pupa of Pitifut Lady-beetle {Pentilia misella); (d) blossom end of pear, showing scales with larva and beetles feeding on them; (e) Twice-stabbed Lady-beetle (Chilocorus hivulnerus); (/) its larva, (a, b, c and d after Howard, & Marlatt, c and / after Riley). Curtis scale (Aspidiotus ostreceformis Figs. 16-18, This scale is mucli mo

. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. jyo7 KNTOMOLOGICAL SOCIETY. 57 '.^vS tthSftn. -.--t^^^^pl^ /'l^.. 'j#>rr... ii /?m_,g^fc:; Fig. 15. Two enemies of the San Jose Scale, (a) Beetle; (6) larva; (c) pupa of Pitifut Lady-beetle {Pentilia misella); (d) blossom end of pear, showing scales with larva and beetles feeding on them; (e) Twice-stabbed Lady-beetle (Chilocorus hivulnerus); (/) its larva, (a, b, c and d after Howard, & Marlatt, c and / after Riley). Curtis scale (Aspidiotus ostreceformis Figs. 16-18, This scale is mucli mo Stock Photo
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Contributor:

Library Book Collection / Alamy Stock Photo

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RMAP3W

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7.1 MB (435 KB Compressed download)

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Dimensions:

1521 x 1642 px | 25.8 x 27.8 cm | 10.1 x 10.9 inches | 150dpi

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. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. jyo7 KNTOMOLOGICAL SOCIETY. 57 '.^vS tthSftn. -.--t^^^^pl^ /'l^.. 'j#>rr... ii /?m_,g^fc:; Fig. 15. Two enemies of the San Jose Scale, (a) Beetle; (6) larva; (c) pupa of Pitifut Lady-beetle {Pentilia misella); (d) blossom end of pear, showing scales with larva and beetles feeding on them; (e) Twice-stabbed Lady-beetle (Chilocorus hivulnerus); (/) its larva, (a, b, c and d after Howard, & Marlatt, c and / after Riley). Curtis scale (Aspidiotus ostreceformis Figs. 16-18, This scale is mucli more widely distributed throughout Ontario than has been hitherto supposed, but in spite of its prevalence, it does not seem to be very destructive. The adult female resembles the San Jose in being circular and having the exuviae centrally situated as a rule, though with many exceptions. It differs, however, in several important particulars: (1) It is considerably larger, averaging about 2 mm. in diameter, whereas the San Jose averages about 1.4 mm. (2) It is much more convex. (3) A smaller proportion of the exuvial part is light colored, in fact only the nipple, whereas a con- siderable part of the central portion of the San Jose was lighter than the general color of the scale. (4) There is a light or whitish colored margin to bp seen around the outside of most of the scales. (5) The surface is rougher. (6) The usual winter form is not nearly black like the San Jose but is a whitish brown, and has no ring or depression around a distinct nip- ple. This scale passes the winter in mature condition for the most part. It matures about the end of June. Like the San Jose it brings forth living young which continue to be produced throughout nearly all of July. There is, however, only one generation in a year.. 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 n

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