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Broadleaf Weed Control in Winter-Sown Lentil (Lens culinaris)

Published online by Cambridge University Press:  20 January 2017

Hassan Karimmojeni ,
Ali Reza Yousefi ,
Per Kudsk  and
Amir Hossein Bazrafshan
Hassan Karimmojeni
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
Ali Reza Yousefi*
Affiliation:
Department of Agronomy and Plant Breeding, University of Zanjan, Zanjan, Iran
Per Kudsk
Affiliation:
Department of Agroecology, Aarhus University, Flakkebjerg, DK-4200 Slagelse, Denmark
Amir Hossein Bazrafshan
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
*
Corresponding author's E-mail: yousefi.alireza@znu.ac.ir.
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Abstract

Winter sowing of lentil results in higher yields than a spring-sown crop. However, when lentil is winter-sown, the critical period of weed control is extended and might require sequential herbicide management strategies to obtain maximum yields. The efficacy of POST alone or soil applied followed by (fb) POST herbicides or hand weeding were evaluated in 2002 and 2003. Trifluralin (PPI) or pendimethalin (PRE) were applied at planting, and pyridate or oxyfluorfen were applied POST at the three- to four-leaf stage of lentil. The lowest level of weed biomass was recorded with all treatments, except pyridate alone in both years, pendimethalin PRE fb pyridate in 2002, and oxyfluorfen in 2003. Application of pyridate or oxyfluorfen POST alone resulted in lower yields. In 2002, trifluralin PPI or pendimethalin PRE fb one hand weeding or pendimethalin fb pyridate resulted in yields similar to the weed-free treatment. In 2003, yields were similar to the weed-free treatment, except pyridate or oxyfluorfen alone and trifluralin PPI fb oxyfluorfen. Weed species observed in the present study required sequential management to achieve both effective control and maximum lentil yield.

La siembra en invierno de lenteja resulta en mayores rendimientos que la siembra en la primavera. Sin embargo, cuando se produce lenteja en el invierno, el período crítico para el control de malezas es más largo y puede requerir estrategias de manejo con aplicaciones secuenciales de herbicidas para obtener rendimientos máximos. En 2002 y 2003, se evaluó la eficacia de herbicidas POST aplicados solos, de herbicidas aplicados al suelo seguidos (fb) de herbicidas POST, y de deshierba manual. Trifluralin (PPI) o pendimethalin (PRE) fueron aplicados a la siembra, y pyridate u oxyfluorfen fueron aplicados POST en los estadios de desarrollo de tres a cuatro hojas de la lenteja. La menor biomasa de malezas se registró con todos los tratamientos, excepto pyridate solo, en ambos años, pendimethalin PRE fb pyridate en 2002, y oxyfluorfen en 2003. La aplicación POST de pyridate u oxyfluorfen solos resultó en rendimientos más bajos. En 2002, trifluralin PPI o pendimethalin PRE fb deshierba manual o pendimethalin fb pyridate resultó en rendimientos similares al testigo libre de malezas. En 2003, los rendimientos fueron similares al testigo libre de malezas, excepto por pyridate u oxyfluorfen solos y trifluralin PPI fb oxyfluorfen. Las especies de malezas que se observaron en el presente estudio requirieron un manejo secuencial para alcanzar un control efectivo y un rendimiento máximo de la lenteja.

Keywords

Oxyfluorfenpendimethalinpyridatetrifluralinlentil, Lens culinaris Medik. ‘Ziba'Amaranthus blitoidesblack nightshadecommon cockleburcommon lambsquarterschemical weed controlChenopodium albumhand weedingPOST herbicidesprostrate pigweedSolanum nigrumXanthium strumarium
Type
Research Article
Information
Weed Technology , Volume 29 , Issue 1 , March 2015 , pp. 56 - 62
Copyright
Copyright © Weed Science Society of America 

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