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: An
    title: assessment of plant resistance to the sorghum midge, Contarinia sorghicola, in selected lines of Sorghum bicolor
  name:
    name part: Wuensche, Allen Lloyd
    name part: 1945-
    role:
      role term: creator
  name:
    name part: Adkisson, Perry L.
    role:
      role term: degree committee member.
  name:
    name part: Johnson, Jerry W.
    role:
      role term: degree committee member.
  name:
    name part: Niles, G. Alva
    role:
      role term: degree committee member.
  name:
    name part: Teetes, George L.
    role:
      role term: degree supervisor.
  name:
    name part: Walker, J. Knox
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1980
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xvii, 193 leaves : illustrations (some color) ; 29 cm
  abstract: During a 4-year period, plant resistance in sorghum to Contarinia sorghicola was studied. Experiments were conducted (1) to determine the relative level of resistance to the sorghum midge possessed by selected lines previously reported as resistant, (2) to determine the mechanisms involved in the midge resistance exhibited by such lines, (3) to screen converted exotic lines for additional sources of midge resistance, and (4) to study 1 aspect of plant and 1 aspect of insect biology; namely, pseudoresistance in sorghum and the feeding process of sorghum midge larvae. Comparison of the mean threshed weights of seed obtained from caged and exposed panicles of 4 sorghum lines (TAM 2566, SC 423, TAM 428, and TX 7000) in a yield test showed that yield reductions following exposure to sorghum midge infestation are smallest for TAM 2566. Results of comparisons of adult emergence from 6 sorghum lines failed to show any differences in the level of resistance possessed by TAM 2566, SGIRL-MR-1, AF 28, or SC 423. In studies of the mechanisms of resistance, evaluation of the results of yield, adult emergence, and carvopsis development data failed to identify tolerance as an important mechanism of resistance. However, analysis of the caryopsis data indicated that weight gains of TAM 2566 and TAM 428 were greater than SC 423 or TX 7000 during the period when late-instar larval feeding could be expected. Nonpreference by ovipositing females was shown for the following lines, listed in order of increasing undesirability to females: SGIRL-MR-1, AF 28, TAM 428, Sc 423, and TAM 2566. When cages spikelets of each of 5 resistant lines at anthesis were each infested with 3 ovipositing females, antibiosis in the form of greater larval mortality was indicated by reduced numbers of larvae and pupae found in spikelets of TAM 2566 and SGIRL-MR-1. Larval measurements showed that larvae reared in the spikelets of TAM 2566 and SC 423 were significantly shorter and narrower than larvae found in TAM…
  note: "Major subject: Entomology."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1980
  note: Includes bibliographical references (leaves 131-144).
  subject:
    geographic code: n-us-tx
  subject:
    topic: Sorghum midge
  subject:
    topic: Sorghum
    topic: Diseases and pests
    geographic: Texas
  subject:
    topic: Major entomology
  subject:
    topic: Sorghum
    topic: Diseases and pests
  subject:
    geographic: Texas
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-664644
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-664644
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 810615
    record change date: 20220104090453.0
    record identifier: in00000656677
    language of cataloging:
      language term: eng