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Tolerance of Direct-Seeded Paprika Pepper (Capsicum annuum) to Clomazone Applied Preemergence

Published online by Cambridge University Press:  20 January 2017

Jose Cavero ,
Joaquin Aibar ,
Miguel Gutierrez ,
Sonsoles Fernandez-Cavada ,
Jose M. Sopena ,
Alfonso Pardo ,
Maria L. Suso  and
Carlos Zaragoza
Jose Cavero*
Affiliation:
Estacion Experimental Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain
Joaquin Aibar
Affiliation:
Escuela Universitaria Politecnica, 22071 Huesca, Spain
Miguel Gutierrez
Affiliation:
Dept. Agricultura (DGA), Apdo. 727, 50080 Zaragoza, Spain
Sonsoles Fernandez-Cavada
Affiliation:
Dept. Agricultura (DGA), Apdo. 727, 50080 Zaragoza, Spain
Jose M. Sopena
Affiliation:
Dept. Agricultura (DGA), Apdo. 727, 50080 Zaragoza, Spain
Alfonso Pardo
Affiliation:
Centro de Investigacion y Desarrollo Agrario, Apdo. 1056, 26080, Logroño, Spain
Maria L. Suso
Affiliation:
Centro de Investigacion y Desarrollo Agrario, Apdo. 1056, 26080, Logroño, Spain
Carlos Zaragoza
Affiliation:
Dept. Agricultura (DGA)
*
Corresponding author's E-mail: jcavero@eead.csic.es.
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Abstract

Field experiments were conducted from 1997 to 1999 at Ejea and at Valdegon (Spain) to study weed control and tolerance of direct-seeded pepper ‘Agridulce SIA’ to clomazone alone or with linuron, napropamide, or pendimethalin. The main weeds at Ejea were redroot pigweed, Diplotaxis erucoides, common purslane, and ivyleaf speedwell, while at Valdegon they were Solanum physalifolium and common purslane. Pepper was tolerant to clomazone applied at 0.18 kg ai/ha, but weed control was less than 77%. Increasing the rate of clomazone to 0.36 kg/ha controlled weeds at least 85% and did not injure pepper. Clomazone at 0.54 and 0.72 kg/ha injured pepper 6 wk after planting (WAP), but plants recovered and the dry weight and yield of paprika were not affected. Napropamide at 2.03 kg ai/ha applied with clomazone improved the control of D. erucoides. Addition of pendimethalin at 0.17 to 0.25 kg ai/ha to clomazone did not improve weed control and increased pepper injury 6 WAP in 1 of 2 yr, but yield was not affected. Linuron at rates ranging from 0.08 to 0.13 kg ai/ha used in combination with clomazone provided complete weed control but injured pepper the most (34 to 88%) and reduced pepper stand by 50% in 1 yr.

Keywords

Clomazonelinuronnapropamidependimethalincommon purslane, Portulaca oleracea L. #3 POROLDiplotaxis erucoides (L.) DCivyleaf speedwell, Veronica hederifolia L. # VERHEredroot pigweed, Amaranthus retroflexus L. # AMARESolanum physalifolium Rusbypaprika pepper, Capsicum annuum L., ‘Agridulce SIA’Weed controlConvolvulus arvensisCONARPRE, preemergenceWAP, weeks after planting
Type
Research
Information
Weed Technology , Volume 15 , Issue 1 , March 2001 , pp. 30 - 35
Copyright
Copyright © Weed Science Society of America 

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