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Tolerance of Direct-seeded Pepper (Capsicum annuum) Under Plastic Mulch to Herbicides

Published online by Cambridge University Press:  12 June 2017

Jose Cavero ,
Carlos Zaragoza  and
Ramiro Gil-Ortega
Jose Cavero
Affiliation:
Servicio de Investigacion Agraria, Apdo 727, Zaragoza 50080, Spain
Carlos Zaragoza
Affiliation:
Servicio de Investigacion Agraria, Apdo 727, Zaragoza 50080, Spain
Ramiro Gil-Ortega
Affiliation:
Servicio de Investigacion Agraria, Apdo 727, Zaragoza 50080, Spain
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Abstract

Tolerance of direct-seeded pepper under clear plastic mulch to herbicides applied pre- and post-emergence was investigated in 1991 and 1992. Weed control of herbicides applied preemergence was also studied. Paprika cultivar ‘Buketen’ and canning cultivars ‘Piquillo de Lodosa’ and ‘Pico de Mendavia’ were seeded in the field in Zaragoza, Spain, in a loamy soil. Percent emergence, plant mortality after the postemergence treatment, dry weight of plants, and fruit weight were recorded. Pepper was tolerant to diphenamid and napropamide applied preemergence but these herbicides did not control broadleaf weeds. Clomazone, when applied preemergence resulted in chlorotic seedlings and at 2 kg ai/ha reduced the final stand, but was selective when applied at the 6 to 8-leaf stage of the crop. Pepper was tolerant to diethatyl-ethyl when applied preemergence. However, diethatyl-ethyl applied postemergence caused severe phytotoxicity symptoms, and when mixed with diphenamid, fruit ripeness in 1992 was delayed. Weed control during the crop emergence period was better when diethatyl-ethyl was used mixed with diphenamid or napropamide.

Keywords

Clomazone, 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidonediethatyl-ethyl, N-(chloroacetyl)-N-(2,6-diethylphenyl)glycinediphenamid, N,N-dimethyl-α-phenyl benzeneacetamide, napropamide, N,N-diethyl-2-(1-naphthalenyloxy)propanamidepepper, Capsicum annuum L.Postemergencepreemergenceweed controlclomazonediethatyl-ethyldiphenamidnapropamideAmaranthus hybridusBrassia kaberChenopodium albumCyperus rotundusDatura stramoniumDigitaria sanguinalisPortulaca oleraceaSetaria glaucaXanthium strumarium# AMACHCHEALCYPRODATSTDIGSAPOROLSETLUSINARXANST
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 900 - 906
Copyright
Copyright © 1996 by the Weed Science Society of America 

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