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Notes on Insects of Economic Importance; Outlines of Lectures in Economic Entomology

Notes on Insects of Economic Importance; Outlines of Lectures in Economic Entomology


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...in the fall on old wood and hatch the following spring; the young lice go to the leaves and form galls on the lower sides; in these galls a female may lay 500 or 600 eggs; there may be 6 or 7 generations a season on the leaves; in fall young pass to roots and winter there; the root-forms cause galls on the roots and great injury; winged females issue from cracks in the soil in fall of second year and go to the stems of vines where they lay 2 to 8 eggs; these eggs are of two sizes the smaller yielding males and the larger females; the true females are small with rudimentary mouthparts and each one lays a single true egg. Control--In France they use American root-stocks. The Grape Root-Worm2 (Fidia viticida). The most serious pest of the grape in this state; probably invaded Chautauqua grape region about 1899; it is an American insect and widely distributed over the northern half of the eastern United States. 'Marlatt--U. S. Farmers' Bull. 70. Quayle--Calif. Bull. 192. 2Slingerland--Cornell Bull. 184. Hammar--U. S. Bu. Ent. Bull. 89. Hartzell--Geneva Bull. 331. The adult beetles appear last of June or first of July and begin feeding on leaves making characteristic chainlike holes; about middle of July they begin to deposit eggs in masses under the loose 'bark on the canes and trunks; the eggs hatch in about two weeks and the larvae drop to the ground where they make their way to the roots through cracks and crevices of the soil; they live upon the roots and become nearly and sometimes fullgrown by fall; in November the larvae burrow to a depth of a foot, form cells in the soil and pass the winter; in early May they return to the roots, feed a short time and change to pupae along in the middle of June; the partly grown larvae may feed longer; the pupal stage l...


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Product Details
  • ISBN-13: 9781130650907
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 32
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130650901
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 77 gr

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Notes on Insects of Economic Importance; Outlines of Lectures in Economic Entomology
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