Abstract
In recent years, sweet and sour cherry production in Serbia has increased. Under Serbian agroecological conditions, pathogens causing leaf diseases threaten the success of sweet and sour cherry production. In the period 2012-2019, the health status of cherries was monitored in more than 30 locations. Depending on the production system, the following leaf pathogens were identified: Blumeriella jaapii, Wilsonomyces carpophilus, Mycosphaerella cerasella, Phoma prunicola, Podosphaera clandestina and Pseudomonas syringae pv. syringae and morsprunorum race 1. Leaf pathogens caused premature defoliation, which adversely affected bud formation for the next growing season and increased susceptibility to freezing. Therefore, attention should be focused on correct leaf pathogen identification, and proper selection, application and rotation of fungicides.
Highlights
Sweet cherry (Prunus avium L.) and sour cherry (P. cerasus L.) production is threatened by a significant number of phytopathogens affecting cherry leaves and causing premature defoliation, reduced shoot growth, increased susceptibility to winter injury, higher tree mortality, branch breakage and replanting problems.Cherry leaf spot caused by Blumeriella jaapii (Rehm) Arx
The isolation was performed on Potato Dextrose Agar (PDA), Water Agar (WA), Nutrient Agar (NA) and Nutrient Sucrose Agar (NSA)
In order to determine the most common and potentially threatening pathogens in sour and sweet cherry production in the agro-ecological conditions of Serbia, in this study we observed some major characteristics of the leaf pathogens determined
Summary
Cherry leaf spot caused by Blumeriella jaapii (Rehm) Arx Ex Sacc.) is one of the most important and economically significant fungal pathogens affecting sweet and sour cherry both worldwide and in Serbia (Jones and Sutton, 1996; Schuster, 2004; Elmhirst, 2006; Lindhard Pedersen et al, 2012; Balaţ et al, 2012; Iličić et al, 2017; 2018a). Blumeriella jaapii affects nursery-grown stone fruits, as well as several cultivated ornamental and wild Prunus species (Jones, 1995). This pathogen primarily affects leaves, compromising photosynthetic ability, causing early defoliation, yield reduction and lower fruit quality. Teleomorph Mycosphaerella cerasella Aderhold) probably has worldwide prevalence This pathogen has been detected on sweet and sour cherry and other Prunus species (Sztejnberg, 1986; 1995). Phyllosticta prunicola Sacc., Phoma pomorum Thuem.) and Podosphaera clandestina (Wallr.: Fr.) Lév. can occur
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