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Bragantia

Print version ISSN 0006-8705

Abstract

ZARATE, Néstor Antonio Heredia et al. Sprouting and yield of 'Amarela de Carandaí' peruvian carrot from cuttings disinfected with eucalyptus oil and rooted in trays. Bragantia [online]. 2010, vol.69, n.4, pp.871-875. ISSN 0006-8705.  http://dx.doi.org/10.1590/S0006-87052010000400012.

This work aimed to evaluate the sprouting of cuttings and yield of 'Amarela de Carandaí' peruvian carrot plants from cuttings which were disinfected with eucalyptus oil and rooted in polyethylene trays. In pre-rooting on trays, the Plan Puebla III experimental matrix was used to combine doses of eucalyptus oil and immersion periods, respectively: 0.6%/36 s; 1.4%/36 s; 0.6%/84 s; 1.4%/84 s; 1.0%/60 s; 0.1%/36 s; 1.9%/84 s; 0.6%/6 s and 1.4%/114 s, added a control (0.0%/0 s). At field, ten cuttings per plot and six treatments were used: 0.6%/36 s; 0.6%/84 s; 1.0%/60 s; 0.1%/36 s; 0.6%/6 s and 0.0%/0 s. Highest percentages of sprouted cuttings and height of plants were obtained in treatments with doses of eucalyptus oil smaller than 1.0% and the control. The highest fresh weight of commercial roots, which were harvested at 264 days after planting, were obtained in 0.6%/36 s, 0.6%/84 s and 1.0%/60 s treatments. There was burning of leaves caused by Alternaria sp. and Septoria sp., with more intensity on 111 days after planting, which showed theirselves associated and without possibility of isolate quantification. It was concluded that, to achieve higher yield of commercial roots, it must disinfect the cuttings with aqueous solution with doses of 0.6% or 1.0% of eucalyptus oil and immersion for periods of 36 s to 84 s, with harvest at 264 days after planting.

Keywords : Arracacia xanthorrhiza; alternative control of diseases; pre-rooting.

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