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Weed Control in Established Alfalfa (Medicago sativa) with Postemergence Herbicides

Published online by Cambridge University Press:  20 January 2017

María C. Arregui ,
Daniel Sánchez  and
Roberto Scotta
María C. Arregui*
Affiliation:
Kreder 2805, 3080 Esperanza, Argentina
Daniel Sánchez
Affiliation:
Kreder 2805, 3080 Esperanza, Argentina
Roberto Scotta
Affiliation:
Kreder 2805, 3080 Esperanza, Argentina
*
Corresponding author's E-mail: [email protected].
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Abstract

Field experiments were conducted during 1998, 1999, and 2000 in Santa Fe, Argentina, to evaluate chlorimuron, clethodim, flumetsulam, 2,4-DB, glyphosate, and haloxyfop for control of broadleaf and grass weeds in established alfalfa. Herbicides were applied to alfalfa, 6 to 10 cm in height, after first or second cuttings. Clethodim and haloxyfop were highly effective against bermudagrass, barnyardgrass, and knotroot foxtail, and alfalfa yields were increased. 2,4-DB was effective against Scotch thistle, swinecress, turnipweed, and birdsrape mustard, but no effects were observed on alfalfa yields. Chlorimuron, flumetsulam, and glyphosate were effective against burning nettle, common chickweed, common lambsquarters, spiny cocklebur, and Persian speedwell, but they injured alfalfa and decreased yields.

Keywords

Chlorimuronclethodim2,4-DBflumetsulamglyphosatehaloxyfopalfalfa, Medicago sativa (L.)barnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHGAbermudagrass, Cynodon dactylon (L.) Pers. # CYNDAbirdsrape mustard, Brassica rapa (L.) # BRACAburning nettle, Urtica urens (L.) # URTURcommon chickweed, Stellaria media (L.) Villars # STEMEcommon lambsquarters, Chenopodium album (L.) # CHEALknotroot foxtail, Setaria geniculata (Lam.) Beauv. # SETGEPersian speedwell, Veronica persica Poir. # VERPEScotch thistle, Onopordum acanthium (L.);spiny cocklebur, Xanthium spinosum (L.) # XANSPswinecress, Coronopus didymus Sm. # COPDIturnipweed, Rapistrum rugosum (L.) All. # RASRUDATdays after treatment
Type
Research
Information
Weed Technology , Volume 15 , Issue 3 , September 2001 , pp. 424 - 428
Copyright
Copyright © Weed Science Society of America 

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References

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