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Interference Durations of Bearded Sprangletop (Leptochloa fascicularis) in Rice (Oryza sativa)

Published online by Cambridge University Press:  12 June 2017

V. Frank Carey III ,
Roy J. Smith Jr.  and
Ronald E. Talbert
V. Frank Carey III
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72701
Roy J. Smith Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Stuttgart, AR 72160
Ronald E. Talbert
Affiliation:
Univ. Arkansas, Fayetteville, AR 72701
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Abstract

Effects of bearded sprangletop interference durations on Lemont and Newbonnet rice cultivars were studied. Interference durations of 63, 70, and 130 d after rice emergence reduced Lemont grain yields 11, 21, and 50%, respectively, and lowered Newbonnet grain yields 11, 13, and 37%, respectively. Interference durations of 21 to 56 d after emergence did not reduce grain yields of either cultivar. Bearded sprangletop grown in Lemont rice produced more biomass than that in Newbonnet. Season-long interference reduced plant height and straw dry weight of Lemont more than that of Newbonnet.

Keywords

Bearded sprangletop, Leptochloa fascicularis (Lam.) Gray, # LEFFArice, Oryza sativa L. ‘ Lemont’ and ‘ Newbonnet.’Weed interferenceweed competitionLEFFA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 42 , Issue 2 , June 1994 , pp. 180 - 183
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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