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Weed Potential of the Forage Legume Aeschynomene (Aeschynomene americana) in Rice (Oryza sativa) and Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Ann M. Thro ,
Alan T. Wier  and
F. Gilbert Barker
Ann M. Thro
Affiliation:
Dep. Agron., La. State Univ. Agric. Cent., Baton Rouge, LA 70803-2110
Alan T. Wier
Affiliation:
Dep. Entomol. (formerly Res. Assoc., Dep. Agron.), La. State Univ. Agric. Cent., Baton Rouge, LA 70803-2110
F. Gilbert Barker
Affiliation:
Dep. Plant Pathol. Crop Physiol., La. Agric. Exp. Stn., La. State Univ. Agric. Cent., Baton Rouge, LA 70803-2110
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Abstract

Growth room and field studies were conducted to determine if increasing use of forage aeschynomene may lead to new weed problems in rice and soybeans and to identify possible control measures in these crops. In a growth room study, flooding of ‘Florida Common’ and ‘LSU 1147’ forage aeschynomene did not reduce yield. However, forage aeschynomene seedlings did not emerge from a flooded seedbed, and 1-week-old seedlings were killed by 2.5 or 7.5 cm of flooding. Competition from interseeded forage aeschynomene reduced ‘Centennial’ soybean yields by 81%. Acifluorfen, fomesafen, and lactofen, labeled for soybeans, control forage aeschynomene. Acifluorfen, labeled for rice, may control forage aeschynomene in that crop. Forage aeschynomene might become a weed problem in rice if plants are past the seedling stage when flood water is applied and could cause weed problems in soybeans; but, in most situations, cultural and chemical control practices should provide adequate control.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidfomesafen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-N-(methylsulfonyl)-2-nitrobenzamidelactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoateforage aeschynomene or American jointvetch, Aeschynomene americana L. ♯3 AESAMrice, Oryza sativa L.soybeans, Glycine max (L.) Merr.Aquatic adventitious rootsflood tolerancecompetitionbentazonoxyfluorfenlinuronchlorimuronimazaquin2,4-DAeschynomene indicaAESAMAESIN
Type
Research
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 284 - 290
Copyright
Copyright © 1990 Weed Science Society of America 

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References

Literature Cited

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