Bulletin Volume 82, Pts. 1-5

Bulletin Volume 82, Pts. 1-5

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...chickweed, and mangel. All of these tender rootlets, and perhaps many others, are fed upon by the larvae. THE ADULT. Food plants.--The hop flea-beetle has been observed feeding upon a large number of plants. Some of these are distinctly preferred; others are accepted after the beetles have fed upon the hop or mangel; and still others are attacked in the field, but not after the insects have eaten of their preferred food plants. A series of experiments was conducted to determine which plants were preferred and their order of preference. Beetles were confined on several species of plants, and each day when fresh food was supplied the species which was eaten the most was left out. Thus by elimination the order of preference was obtained. This order for beetles captured on the hop was found to be quite different from that for beetles captured on the mangels, as is shown by the following list: Table II.--Food plants of the hop flea-beetle. In order of preference of beetles taken from the hop. Hop (Humulus lupulus L.). Nettle (Urtica dioica L.). Tomato (Lycopersicum esculcntum Mill.). Mangel (Beta vulgaris Moq.). Radish (Raphanus sativus L.). Mustard (Brassica nigra L.). Lambs-quarters (C'lieno podin in al-bum L.)-Watermelon (Citrullus vulgaris Schrad.). 82 In order of preference of beetles taken from the mangel. Nettle (Urtica dioiea L.). Rhubarb (Rheum officinale Baill.). Radish (Raphanus sativus L.). Mustard (Brassica nigra L.). Lambs-quarters (Chenopodium al-bum L.). Mangel (Beta vulgaris Moq.). Hop (Hamulus lupulus L.). Watermelon (Citrullus vulgaris Schrad.). SECOND CLASS." Rhubarb (Rheum officinale Baill.). Tomato (Lycopersicum esculcntum Potato (Solarium tuberosum L.). Mill.). Pigweed (Amaranthus retroflexus L.). Potato (Solatium...show more

Product details

  • Paperback | 44 pages
  • 189 x 246 x 2mm | 95g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236800915
  • 9781236800916