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:
    title: Quantitation and impact of particle drift from auxin-like herbicides
  name:
    name part: Sciumbato, Audy Shane
    name part: 1973-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 2004
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiii, 133 leaves : illustrations ; 28 cm.
  abstract: These studies were conducted at the Texas A&M Field Laboratory, the Texas A&M University campus, and at the campus of New Mexico State in Las Cruces, NM. First, the effects of quinclorac on cotton (Gossypium hirsutum L.) and tomato (Lycopersicon esculentum var pyriforme 'Roma') were evaluated to create an injury-evaluation procedure that could be used to quantify quinclorac drift rates based on plant injury. Next, spray droplet size spectra produced by quinclorac and the liquid, dry, and emulsion formulations of 2,4-D during application with various nozzle sizes were evaluated using a Malvern laser spectrometer. Quinclorac and 2,4-D formulations were also sprayed through different nozzles in a drift chamber to assess spray deposition at different wind speeds. Finally, the effects of reduced rates of 2,4-D on cotton growth, development, and yield were observed. These data were used in conjunction with previous research to predict yield loss from early-season drift injury. Evaluation scales for quinclorac injury on cotton and tomato were successfully constructed from previous scales. This suggests that such scales can be used with different species and herbicides, but changes may be necessary for some auxin-like herbicides or plant species. Data from the Malvern laser spectrometer suggested that formulations of 2,4-D affected droplet size, particularly when the SS8001 flat-fan nozzle was used. Quinclorac had little influence on droplet sizes when compared to water alone. Drift-chamber studies revealed that more liquid-formulated 2,4-D than emulsion was deposited downwind from the spray nozzle under 15 km/h wind conditions. Finally, 2,4-D applied to field cotton had little influence on cotton nodes and boll weights, but decreased the number of reproductive bolls. Strong correlations were recorded for cotton injury and yield loss, particularly during 2002 and 2003 (R² = 0.82 and 0.80, respectively). These studies are valuable because they provide information regarding q…
  note: by Audy Shane Sciumbato.
  note: Vita.
  note: "Major Subject: Agronomy".
  note: Issued also on microfiche from University Microfilm Inc.
  note: Ph. D. Texas A&M University 2004
  note: Includes bibliographical references (leaves 91-97).
  subject:
    topic: Major agronomy
  identifier: 31-41867 UMI
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 050525
    record change date: 20190326103359.0
    record identifier: in00002055886