Apricot susceptibility to blossom brown rot (Monilia spp.) and leaf rust (Tranzschelia spp.) under low-input production system
Résumé
Disease-susceptibility of apricot cultivars is a key-stone towards low-input production systems. Among the main diseases, the susceptibility to Monilinia spp. and leaf rust of apricot cultivars are economically important but rarely assessed. A 5-years study in two sites was conducted to assess the susceptibilities to Monilinia spp. and leaf rust of 16 apricot cultivars under natural conditions (no inoculation). No fungicide and insecticide were applied during the experiment. In Torreilles site, no significant Monilinia spp. was observed. In Gotheron site, the percentage of shoots necrosed by Monilinia spp. ranged from 13% to 100% during 2010-2011. A Genotype x Environment interaction was observed for Monilinia spp. damages. Concurrently a high variability to leaf rust was observed in both sites. The ranking of cultivars susceptibility to leaf rust was similar between both sites
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