Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems
Joint Authors
Norsworthy, Jason K.
Lancaster, Zachary D.
Scott, Robert C.
Source
International Journal of Agronomy
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-23
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Due to the ongoing evolution of herbicide-resistant weeds, new technologies are needed to maintain effective levels of control.
A new rice variety that will be resistant to quizalofop, an acetyl coenzyme A carboxylase- (ACCase-) inhibiting herbicide, is currently under development.
With the anticipated launch of this technology in 2018, multiple experiments were conducted to determine effectiveness of the quizalofop-resistant rice system for common grass weed species found in Arkansas rice production.
One hundred and twenty-six barnyardgrass populations were collected across Arkansas and treated with quizalofop at 80 g ai ha−1 to determine a baseline of response.
All populations evaluated were effectively controlled (≥92%) by quizalofop, with only 13 populations resulting in lower than 98% control.
A greenhouse and field trial were conducted to compare efficacy of quizalofop to currently labeled rice graminicides for control of common rice grass weeds.
Results from the greenhouse experiment showed that quizalofop treatments resulted in greater efficacy of common grass weeds compared to cyhalofop or fenoxaprop.
This was especially apparent at the larger grass growth stages.
A field experiment conducted compared season-long weed control programs of quizalofop to fenoxaprop and cyhalofop.
The quizalofop-containing treatments were no better than fenoxaprop and cyhalofop for barnyardgrass and broadleaf signalgrass control.
Barnyardgrass and broadleaf signalgrass control were greater than 96% for all herbicide treatments.
An additional field experiment was conducted to determine the best rate structure for sequential applications of quizalofop in rice.
Sequential applications of quizalofop at 120 g ha−1 followed by 120 g ha−1 two weeks later resulted in the highest barnyardgrass and broadleaf signalgrass control.
Likewise, applying the full seasonal use rate of 240 g ha−1 of quizalofop resulted in greater control compared to 200 and 160 g ha−1.
Results from this research indicate a strong benefit from quizalofop use in rice.
American Psychological Association (APA)
Lancaster, Zachary D.& Norsworthy, Jason K.& Scott, Robert C.. 2018. Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems. International Journal of Agronomy،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1166217
Modern Language Association (MLA)
Lancaster, Zachary D.…[et al.]. Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems. International Journal of Agronomy No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1166217
American Medical Association (AMA)
Lancaster, Zachary D.& Norsworthy, Jason K.& Scott, Robert C.. Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems. International Journal of Agronomy. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1166217
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1166217