rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: quantification of blackmargined aphid (Monellia caryella (Fitch)) honeydew production in pecan (Carya illinoinensis (Koch)) in Texas
  name:
    name part: Honaker, Jessica Marie
    name part: 1980-
    role:
      role term: creator
  name:
    name part: Harris, M. K. (Marvin K.)
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2008
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
  abstract: Field studies of the blackmargined aphid, Monellia caryella (Fitch), were conducted on three cultivars, 'Cheyenne', 'Kiowa', and 'Pawnee', of pecan, Carya illinoinensis (Koch). Aphid density and natural enemy (lacewings, ladybird beetles, and spiders) densities were determined biweekly by direct inspection of 160 leaves per variety during the 2005 and 2006 growing seasons. Honeydew deposition was measured biweekly using water sensitive cards. Aphid phenologies were similar among cultivars; however, 'Cheyenne' supported higher densities of aphids than either 'Kiowa' or 'Pawnee'. Honeydew production correlated positively with aphid density. Honeydew produced per aphid differed only between 'Cheyenne' and 'Pawnee' in 2006; natural enemies per aphid varied in significance during both seasons. Natural enemy densities increased during initial stages of outbreak on all cultivars in 2006. The asymptote reached on 'Cheyenne' had a lower natural enemy to aphid ratio than that on the other cultivars, indicating that the functional response of natural enemies to increased aphid densities was exhausted sooner on 'Cheyenne than on other cultivars'. Honeydew appears to be an attractant for natural enemies and cost-benefit calculations were made to quantify the loss of photosynthates to aphids for each cultivar versus the gain in natural enemies that occurred. 'Cheyenne' was the least efficient of the three cultivars in the utilization of this defense mechanism. The energy drain per hectare attributable by adult aphid feeding was, 761,197 - 900,312kcal, 266,397 - 237,709kcal, and 138,790 - 134,223kcal for 'Cheyenne', 'Kiowa', and 'Pawnee', respectively. Calculated nut-loss equivalents were 14 - 16kg for 'Cheyenne', 4 - 5kg for 'Kiowa', and 2kg for 'Pawnee'.
  note: by Jessica Marie Honaker.
  note: "Major Subject: Entomology"
  note: Title from author supplied metadata (automated record created on Oct. 13, 2008.)
  note: Vita.
  note: Abstract.
  note: Electronic resource.
  note: Mode of access: World Wide Web.
  note: System requirements: World Wide Web access and Adobe Acrobat Reader.
  note: M. S. Texas A&M University 2007.
  note: Includes bibliographical references.
  note: Text (M. S.).
  subject:
    topic: Major entomology
  subject:
    topic: Pecan
  subject:
    topic: Blackmargined Aphid
  subject:
    topic: Energy
  subject:
    topic: Honeydew
  identifier: http://hdl.handle.net/1969.1/85836
  record info:
    record content source: TXA
    record creation date: 090407
    record change date: 20151110091702.0
    record identifier: in00002465990