Evaluation of Monilinia fructicola on apricot fruits

J. Del Cueto, P. Stefani, D. Christen
Monilinia fructicola has been a quarantine pathogen in Europe until 2014; however, the disease risk remains large for Prunus species, because of the continuing spreading around Europe. In order to assess the impact of this fungus on apricot fruits, differences in cultivar susceptibility need to be evaluated. For this purpose, more than 50 different international cultivars tested in Agroscope orchards in Switzerland were inoculated with M. fructicola at harvest time under controlled. After 63 h, the diameter of the infection in the fruit was measured, as well as the pH of the flesh that could be a mechanism of resistance of the fruit by impeaching the entrance of the fungus. Differences between the cultivars were observed, variating between 15 and 35 mm of infection diameter. The most susceptible cultivars were ‘Vanilla cot’, ‘Bigaly’ or ‘Swired’, while the most tolerant were ‘Early Kioto’, ‘Medalis’ or ‘Lido’. No good correlation between branches and flowers symptoms and fruit symptoms was found. Furthermore, no link between the levels of M. fructicola infection and the pH characteristics of the fruit was found.
Del Cueto, J., Stefani, P. and Christen, D. (2020). Evaluation of Monilinia fructicola on apricot fruits. Acta Hortic. 1290, 143-146
DOI: 10.17660/ActaHortic.2020.1290.26
Monilinia fructicola, apricot, fruit, pH, cultivars, new risks

Acta Horticulturae