Response of Direct-Seeded Dry Bulb Onion to Simulated Glyphosate Drift with Variable Rates and Application Timings Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/dn39x215z

This is the author's peer-reviewed final manuscript, as accepted by the publisher. The article is copyrighted by the Weed Science Society of America and published by Allen Press. It can be found at:  http://www.wssajournals.org/loi/wete. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Field studies were conducted in 2011 at the Malheur Experiment Station, Ontario, OR and Prosser, WA to evaluate the effect of simulated glyphosate drift on direct-seeded dry bulb onion. Glyphosate was applied at 8.6, 25.8, 86, 290, 434, and 860 g ae ha⁻¹ when onion plants were at the flag-, two-, four-, and six-leaf stages. Onion foliar injury was directly related to the glyphosate dose and varied with application timing. Foliar injury at 7 d after treatment (DAT) ranged from 0 to 12% for glyphosate ≤ 25.8 g ha⁻¹. Foliar injury increased at 21 DAT when glyphosate was applied ≥ 25.8 g ha⁻¹ to plants at the flag- and four-leaf stage, and ranged from 24 to 99%. The 50%-injury glyphosate dose at 21 DAT was lowest when onion was treated at the four-leaf and flag stages and was estimated to be 76.8 and 81 g ha⁻¹, respectively. Onion injury severity increased when glyphosate was applied at ≥ 86 g ha⁻¹ and eventually resulted in plant death at 860 g ha⁻¹. Foliar injury was inversely correlated to U.S. no. 1 onion yield. Onions displayed sensitivity to very low glyphosate doses especially at the four-leaf stage. Shikimic acid accumulation increased with the increase in glyphosate dose and was positively correlated with foliar injury and negatively correlated with plant height and onion yield.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Joel Felix, Rick Boydston, and Ian C. Burke (2012) Response of Direct-Seeded Dry Bulb Onion to Simulated Glyphosate Drift with Variable Rates and Application Timings. Weed Technology: October-December, Vol. 26, No. 4, pp. 747-756.
Academic Affiliation
Series
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2013-01-11T23:03:04Z (GMT). No. of bitstreams: 1 FelixJoelCropSoilScienceResponseDirectSeeded.pdf: 442463 bytes, checksum: 3f757b563ae472e4df13529f5267bf91 (MD5) Previous issue date: 2012-10
  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2013-01-11T23:03:04Z (GMT) No. of bitstreams: 1 FelixJoelCropSoilScienceResponseDirectSeeded.pdf: 442463 bytes, checksum: 3f757b563ae472e4df13529f5267bf91 (MD5)
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2013-01-11T19:59:20Z No. of bitstreams: 1 FelixJoelCropSoilScienceResponseDirectSeeded.pdf: 442463 bytes, checksum: 3f757b563ae472e4df13529f5267bf91 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items