Bulletin - University of Hawaii, Agricultural Experiment Station Volume 19-35

Bulletin - University of Hawaii, Agricultural Experiment Station Volume 19-35

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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. 1910 edition. Excerpt: ...segment double and ventrad of (4+5); marginal (7) on outer side of each proleg and inner side of each true leg--on legless segments in about the same longitudinal line ventrad of (6)--each has three set; ventral (8) a small tubercle near median ventral line of each segment; cervical shield concolorous with body, with black line on lateral margin; feet concolorous with body, the tips black; spiracles minute, circular, rimmed with brown and center yellowish-white--those on segments 2 and 12 larger than the others. The larval period is 28 to 35 days. Pupation takes place within the folded leaf. Pupa 9 to 12 mm., dark brown on dorsum shading into golden-brown on venter; wing-cases luteous, and extending beyond middle of fourth abdominal segment; spiracular openings small, reddishbrown; on dorsum of abdominal segments 2 to 8 two transverse rows of minute blunt spines, near anterior and posterior margins, becoming smaller outwardly from median line and disappearing before the spiracles; posterior row a trifle more extensive than the anterior; in front of anterior row on median line of dorsum of segments 2 to 7 a pit, partially covered by narrow bl.ickish lip extending from posterior margin of preceding segment; on segment 9 a few scattered hairs; cremaster moderately pointed with eight short recurved spines. The pupal stage covers 10 days. The moth is described by Busck.1 The tortricid leaf roller is parasitized by Chalcis obscurata, which does something to mitigate its destructiveness. Unfortunately, the very valuable egg parasites (Tricliogramma spp.), which contribute more than any others to keep this class of pest in check, are unable to penetrate the tough covering of the Amorbia eggs. Neither of these two pests can be considered very...
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Product details

  • Paperback | 188 pages
  • 189 x 246 x 10mm | 345g
  • United States
  • English
  • black & white illustrations
  • 1236906543
  • 9781236906540