Brown rot fruit reaction in different peach genotypes
DOI:
https://doi.org/10.30612/agrarian.v13i49.8508Keywords:
Breeding. Monilinia fructicola. Prunus sp.. Resistance.Abstract
The brown rot caused by the fungus Monilinia fructicola (Wint.) Honey is the main disease of stone fruits. This attacks the flowers, stems and fruit of host plants, causing severe losses. Thus, it is important to identify genotypes with brown rot resistance to be recommended for using as parents in future breeding programs. The aim of this work was to test the different peach genotypes for brown rot reaction in fruits. Twentysix and 29 peach genotypes were evaluated in the 2009/2010 and 2010/2011 production cycle, respectively. The experiment was carried out at the Laboratório de Fitossanidade, da UTFPR – Campus Dois Vizinhos. The experimental design was entirely randomized, considering each peach genotype a treatment, and it was use three replications of nine fruits by plot. The fruit epidermis was inoculated individually with 0.15 mL of M. fructicola conidial suspension (1.0 x 105spores mL-1). The fruit were examined 72 and 120 hours after inoculation, and the disease incidence and severity were evaluated. Peach genotypes differed significantly for all variables evaluated (incidence and severity) in both production cycles. Fruits from 'Tropic Beauty 'Bonão', 'Cascata 962', 'Conserva 1187', 'Kampai', 'Cascatal 1063', 'Tropic Snow' and 'Rubimel' genotypes showed the lowest brown rot incidence in 2009/2010 and 2010/2011 cycles.Downloads
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