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Effect of Weed Interference Duration and Weed-Free Period on Glufosinate-Resistant Rice (Oryza sativa)1

Published online by Cambridge University Press:  20 January 2017

Wei Zhang
Affiliation:
Department of Agronomy, Louisiana State University Agricultural Center, 104 M. B. Sturgis, Baton Rouge, LA 70803
Eric P. Webster*
Affiliation:
Department of Agronomy, Louisiana State University Agricultural Center, 104 M. B. Sturgis, Baton Rouge, LA 70803
David Y. Lanclos
Affiliation:
Department of Agronomy, Louisiana State University Agricultural Center, 104 M. B. Sturgis, Baton Rouge, LA 70803
James P. Geaghan
Affiliation:
Department of Experimental Statistics, Louisiana State University AgCenter, 161 Agricultural Administration Building, Baton Rouge, LA 70803
*
Corresponding author's E-mail: [email protected]

Abstract

Effect of weed interference duration and weed-free period on glufosinate-resistant rice was evaluated in 1998 and 1999. Weed interference for more than 2 wk reduced plant height 12 wk after emergence compared with the season-long weed-free treatment. Grain yield loss of 1,090 to 4,880 kg/ha was observed when weeds were allowed to interfere with rice from 2 wk to season-long. The weed-free period study indicated that early control of weeds could sustain rice growth and yield potential. This research suggests that effective weed control from 1 to 6 wk after rice emergence is important in fields with high weed densities for maximizing yield potential of glufosinate-resistant rice.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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References

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