. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 47 Of the SolanacejB, or Nightshade family, to which the potato belongs, there are in North America six genera, not counting the South American genus, Petunia, now so largely cultivated in flower gardens. They are (1) Solarium, Nightshade; (2) Pkysalis, Ground Cherry; (3) Mcandra, Apple of Peru: (4) Hyoscyamus, Henbane; (5) Datura, Thorn-apple ; (6) Hicotiana, Tobacco. The first of these includes the potato, the egg plant, and the tomato, all of which are eaten with avidity by the beetl
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 47 Of the SolanacejB, or Nightshade family, to which the potato belongs, there are in North America six genera, not counting the South American genus, Petunia, now so largely cultivated in flower gardens. They are (1) Solarium, Nightshade; (2) Pkysalis, Ground Cherry; (3) Mcandra, Apple of Peru: (4) Hyoscyamus, Henbane; (5) Datura, Thorn-apple ; (6) Hicotiana, Tobacco. The first of these includes the potato, the egg plant, and the tomato, all of which are eaten with avidity by the beetle. When stinted of its favourite supplies, the insect turns to such other members of the family as may grow within its reach. The tobacco plant is attacked by it, and I have found it also upon Physalis and Datura. It would seem that the forced vitality of the species is now diminishing. There is a narrowing do\yn apparently, 1st, as to the number of broods, 2ndly as to the number of individuals. Professor Claypole, of Akron, Ohio, brought the diminution in the former case, under the notice of the American Association for the Advancement of Science, at the Minneapolis meeting. He said :—" This insect (the potato beetle) came as usual in middle Pennsylvania in the early sum- mer. I was compelled to use poison as in previous years. In the latter portion of the summer I observed, and noted at the time in the Canadian Entomologist, that there was no second brood, or that it was so small as to pass unnoticed. It was my intention to watch in 1883 in order to determine if this second brood was again missing ; but to my surprise, in 1883 there was almost no first ; In the neighbourhood of Quebec, late plowing, by disturbing their hiberna- cula, has destroyed great numbers of the beetles, and the lingering winter has retarded the appearance of the survivors, so that the first brood of the year has been both late and comparatively weak in numbers. For the last two season
Size: 1331px × 1878px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
