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

WEI ZHANG, Eric P. Webster, David Y. Lanclos, James P. Geaghan

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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.Nomenclature: Glufosinate; rice, Oryza sativa L. ‘Bengal’, ‘BNGL HC-11’, ‘BNGL-62’.Additional index words: Herbicide-resistant rice.Abbreviation: WAE, wk after emergence.

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What this paper is about

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.Nomenclature: Glufosinate; rice, Oryza sativa L. ‘Bengal’, ‘BNGL HC-11’, ‘BNGL-62’.Additional index words: Herbicide-resistant rice.Abbreviation: WAE, wk after emergence.

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Available 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.Nomenclature: Glufosinate; rice, Oryza sativa L. ‘Bengal’, ‘BNGL HC-11’, ‘BNGL-62’.Additional index words: Herbicide-resistant rice.Abbreviation: WAE, wk after emergence.

Key concepts: Glufosinate, Weed, Agronomy, Oryza sativa, Weed control, Biology, Echinochloa, Yield (engineering)

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Effect of Weed Interference Duration and Weed-Free Period on Glufosinate-Resistant Rice (Oryza sativa)1 — Research Paper | ScholarLens