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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Chemical cues that Bracon compressitarsis Wharton and Bracon thurberiphagae Muesebeck (Hymenoptera:Braconidae) utilize to localize their host Anthonomus grandis Boheman (Coleoptera:curculionidae)
  name:
    name part: Rojas Castellanos, Maria Guadalupe
    name part: 1958-
    role:
      role term: creator
  name:
    name part: Vinson, S. B.
    role:
      role term: degree supervisor.
  name:
    name part: Cate, J. R.
    role:
      role term: degree committee member.
  name:
    name part: Stipanovic, R. D.
    role:
      role term: degree committee member.
  name:
    name part: Williams, H. J.
    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: 1993
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 89 leaves : illustrations ; 28 cm
  abstract: We conducted studies to identify and characterize chemicals responsible for host habitat location by B. compressitarsis and B. thurberiphagae. Copaene, caryophyllene, and humulene were responsible for the orientation of B. compressitarsis to the host plant (Hampea spp. male plants). Caryophyllene and chemicals from weevil frass were responsible for the orientation of B. thurberiphagae to its host plant (Gossypium thurberi). Bracon compressitarsis and B. thurberiphagae were unable to recognize G. hirsutum as host plant to search for boll weevil because of the difference in the ratios and concentrations of plant chemicals when compared against the native host plants, H. nutricia and G. thurberi, respectively. Females of both Bracon species responded to chemical cues after the preovipositional period. Bracon compressitarsis preovipositional period lasted 3.0 ([plus or minus]0.9) days, male and female longevity was 30.1 ([plus or minus]4.5) days and 63.3 ([plus or minus]7.7) days at 23 [plus or minus] 1°C. The preferred weevil instar used as host was third instar. Bracon thurberiphagae preovipositional period lasted 3.04 ([plus or minus]0.5) days, male and female longevity was 28.0 ([plus or minus]5.2) days and 60.5 ([plus or minus]6.3) days at 23 [plus or minus] 1°C. The preferred weevil instar used as host was third instar. These ectoparasitoids were gregarious developing a mean of 4.6 ([plus or minus]3.0) parasitoids per host larva. Both species host fed preferentially on the hemolymph of third instars during the preovipositional period through a feeding tube constructed by the female. Hosts which were used for feeding were not parasitized and they did not complete development. Heliothis virescens was tested as an alternate host for the rearing of B. thurberiphagae. After 3 generations of rearing this ectoparasitoid on H. virescens, the colony of B. thurberiphagae had a severe reduction in fecundity. After the addition of amino acids to the adult wasp diet, a 100% im…
  note: Vita.
  note: "Major subject: Entomology."
  note: Includes bibliographical references.
  note: Ph. D. Texas A & M University 1993
  subject:
    topic: Major entomology
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  identifier: http://proxy.library.tamu.edu/login
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    location:
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  record info:
    record content source: TXA
    record creation date: 960411
    record change date: 20200904152721.0
    record identifier: in00001275623
    language of cataloging:
      language term: eng