Effect of growth stage on the efficacy of postemergence herbicides on four weed species of direct-seeded rice

Chauhan, Bhagirath S. and Abugho, Seth Bernard (2012) Effect of growth stage on the efficacy of postemergence herbicides on four weed species of direct-seeded rice. The Scientific World Journal, 2012 123071.1-123071.7. doi:10.1100/2012/123071


Author Chauhan, Bhagirath S.
Abugho, Seth Bernard
Title Effect of growth stage on the efficacy of postemergence herbicides on four weed species of direct-seeded rice
Journal name The Scientific World Journal   Check publisher's open access policy
ISSN 1537-744X
Publication date 2012
Sub-type Article (original research)
DOI 10.1100/2012/123071
Open Access Status DOI
Volume 2012
Start page 123071.1
End page 123071.7
Total pages 7
Place of publication New York, NY, United States
Publisher Hindawi Publishing
Language eng
Abstract The efficacy of bispyribac-sodium, fenoxaprop + ethoxysulfuron, and penoxsulam + cyhalofop was evaluated against barnyardgrass, Chinese sprangletop, junglerice, and southern crabgrass when applied at four-, six-, and eight-leaf stages. When applied at the four-leaf stage, bispyribac-sodium provided greater than 97% control of barnyardgrass, junglerice, and southern crabgrass; however, it was slightly weak (74% control) on Chinese sprangletop. Irrespective of the weed species, fenoxaprop + ethoxysulfuron provided greater than 97% control when applied at the four-leaf stage. At the same leaf stage, penoxsulam + cyhalofop controlled 89 to 100% barnyardgrass, Chinese sprangletop, and junglerice and only 54% of southern crabgrass. The efficacy of herbicides was reduced when applied at the eight-leaf stage of the weeds; however, at this stage, fenoxaprop + ethoxysulfuron was effective in controlling 99% of Chinese sprangletop. The results demonstrate the importance of early herbicide application in controlling the weeds. The study identified that at the six-leaf stage of the weeds, fenoxaprop + ethoxysulfuron can effectively control Chinese sprangletop and southern crabgrass, penoxsulam + cyhalofop can effectively control Chinese sprangletop, and bispyribac-sodium can effectively control junglerice.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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