<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The apple scab induced by <italic>Venturia inaequalis</italic> is an economically significant disease of apples worldwide and is predominantly controlled by multiple fungicide applications. Therefore, resistant apple cultivation is important for long-standing disease control. The knowledge about cultivar resistance is mainly founded on their evaluation in orchard conditions and testing in a greenhouse that is laborious and requires a large space. This study evaluated apple cultivar resistance and the virulence of <italic>V. inaequalis</italic> strains by inoculating detached leaves and immature fruits. Nine <italic>V. inaequalis</italic> strains originating from different apple-growing regions and host genotypes were tested on eight apple genotypes. Microscopic and macroscopic symptom development and host tissue reactions were monitored during the experiments. The tested <italic>V. inaequalis</italic> strains and cultivars showed different levels of virulence and resistance, respectively. Cultivar ‘Lobo’ was scored as partially susceptible, with almost all strains tested. The incompatible interaction with or without host tissue reactions was observed only on the cultivar ‘Priscilla’ with all the strains and field populations tested. The results of this study using detached leaves and immature fruits were concordant with the data obtained in the cultivar evaluation trials in the orchards.</p>
</abstract>

The apple scab induced by Venturia inaequalis is an economically significant disease of apples worldwide and is predominantly controlled by multiple fungicide applications. Therefore, resistant apple cultivation is important for long-standing disease control. The knowledge about cultivar resistance is mainly founded on their evaluation in orchard conditions and testing in a greenhouse that is laborious and requires a large space. This study evaluated apple cultivar resistance and the virulence of V. inaequalis strains by inoculating detached leaves and immature fruits. Nine V. inaequalis strains originating from different apple-growing regions and host genotypes were tested on eight apple genotypes. Microscopic and macroscopic symptom development and host tissue reactions were monitored during the experiments. The tested V. inaequalis strains and cultivars showed different levels of virulence and resistance, respectively. Cultivar ‘Lobo’ was scored as partially susceptible, with almost all strains tested. The incompatible interaction with or without host tissue reactions was observed only on the cultivar ‘Priscilla’ with all the strains and field populations tested. The results of this study using detached leaves and immature fruits were concordant with the data obtained in the cultivar evaluation trials in the orchards.

Screening of <italic>Venturia inaequalis</italic> virulence and resistance of <italic>Malus</italic> genotypes to apple scab using <italic>in vitro</italic> methodology

Latvia University of Life Sciences and Technologies

Rural Sustainability Research

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

Screening of  virulence and resistance of  genotypes to apple scab using  methodology

The apple scab induced by Venturia inaequalis is an economically significant disease of apples worldwide and is predominantly controlled by multiple fungicide...

Screening of Venturia inaequalis virulence and resistance of Malus genotypes to apple scab using in vitro methodology

Published Online: Jan 05, 2023

Page range: 79 - 90

Received: Oct 29, 2022

Accepted: Nov 29, 2022

DOI: https://doi.org/10.2478/plua-2022-0018

Keywords
detached leaves, immature fruits, pathogenic fungi, plant disease

© 2022 Olga Sokolova et al., published by Sciendo

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

Screening of Venturia inaequalis virulence and resistance of Malus genotypes to apple scab using in vitro methodology

Published Online: Jan 05, 2023

Page range: 79 - 90

Received: Oct 29, 2022

Accepted: Nov 29, 2022

DOI: https://doi.org/10.2478/plua-2022-0018

Keywordsdetached leaves, immature fruits, pathogenic fungi, plant disease

© 2022 Olga Sokolova et al., published by Sciendo

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

Keywords
detached leaves, immature fruits, pathogenic fungi, plant disease