<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Studies conducted during 2009-2013 at the Experimental Orchard located in the central region of Poland showed that the highest number of <italic>V. inaequalis</italic> pseudothecia occurred on ‘McIntosh’ and ‘Cortland’ leaves. A smaller number of pseudothecia was found on the leaves of the Alwa and Jonagold cultivars, but there were no statistical differences. The first discharges of ascospores were noted at a similar time on the leaves of all of the apple cultivars, usually at the end of March or in early April. For the forecasting of ascospore discharges and dates of critical periods, a simulation model by RIMpro was used. The number of critical periods and apple scab severity differed in each season. The most critical periods (above 20) were recorded in 2010 and 2013, which also corresponded with a high severity of apple scab. The number of infected leaves and fruits on the untreated trees of the very susceptible cultivar McIntosh reached nearly 100% during these seasons. In other years, the severity of the disease on the same apple trees was lower and amounted to 30-54% of infected leaves and 23-80% of infected fruits.</p></abstract>

Studies conducted during 2009-2013 at the Experimental Orchard located in the central region of Poland showed that the highest number of V. inaequalis pseudothecia occurred on ‘McIntosh’ and ‘Cortland’ leaves. A smaller number of pseudothecia was found on the leaves of the Alwa and Jonagold cultivars, but there were no statistical differences. The first discharges of ascospores were noted at a similar time on the leaves of all of the apple cultivars, usually at the end of March or in early April. For the forecasting of ascospore discharges and dates of critical periods, a simulation model by RIMpro was used. The number of critical periods and apple scab severity differed in each season. The most critical periods (above 20) were recorded in 2010 and 2013, which also corresponded with a high severity of apple scab. The number of infected leaves and fruits on the untreated trees of the very susceptible cultivar McIntosh reached nearly 100% during these seasons. In other years, the severity of the disease on the same apple trees was lower and amounted to 30-54% of infected leaves and 23-80% of infected fruits.

Study of <italic>Venturia inaequalis</italic> pseudothecia development and apple scab severity under Polish conditions

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Study of  pseudothecia development and apple scab severity under Polish conditions

Studies conducted during 2009-2013 at the Experimental Orchard located in the central region of Poland showed that the highest number of V. inaequalis...

Study of Venturia inaequalis pseudothecia development and apple scab severity under Polish conditions

Published Online: Dec 30, 2015

Page range: 107 - 114

Received: Jun 13, 2015

Accepted: Jul 28, 2015

DOI: https://doi.org/10.1515/fhort-2015-0020

Keywords
ascospore, forecasting system, fungal disease, maturation, source of infection

© 2015 Beata Meszka et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Study of Venturia inaequalis pseudothecia development and apple scab severity under Polish conditions

Published Online: Dec 30, 2015

Page range: 107 - 114

Received: Jun 13, 2015

Accepted: Jul 28, 2015

DOI: https://doi.org/10.1515/fhort-2015-0020

Keywordsascospore, forecasting system, fungal disease, maturation, source of infection

© 2015 Beata Meszka et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
ascospore, forecasting system, fungal disease, maturation, source of infection