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

<p>The negative influence of pathogens on plant development is well known. However, the negative impact depends on various factors: cultivar and rootstock resistance, nutrition, the environment, the virulence, and concentration of pathogens in the plant tissue. The evaluation of apple chlorotic leaf spot virus (ACLSV) influence on apple tree growth and production was performed at Institute of Horticulture (LatHort) from 2012 to 2020. Virus-free and ACLSV-infected trees from the traditional cultivar ‘Antonovka’ and new scab resistant cultivar ‘Gita’ were evaluated on dwarfing rootstock B.396. The presence of four common apple viruses (apple mosaic virus (ApMV), ACLSV, apple stem grooving virus (ASGV), apple stem pitting virus (ASPV)) was assayed in the planting year and repeated at the end of the study period. The vigour of planting material, growth, yield, and yield efficiency were compared between virus negative and ACLSV-infected trees. During eight growing seasons (2013–2020), no statistically significant negative impact of ACLSV infection on tree growth or yield was observed for the cultivars. A larger canopy volume was observed for ACLSV-infected trees (<italic>p</italic> = 0.01), but the cumulative yield per canopy volume was equivalent between virus-negative trees and ACLSV-infected trees (<italic>p</italic> = 0.07).</p>
</abstract>

The negative influence of pathogens on plant development is well known. However, the negative impact depends on various factors: cultivar and rootstock resistance, nutrition, the environment, the virulence, and concentration of pathogens in the plant tissue. The evaluation of apple chlorotic leaf spot virus (ACLSV) influence on apple tree growth and production was performed at Institute of Horticulture (LatHort) from 2012 to 2020. Virus-free and ACLSV-infected trees from the traditional cultivar ‘Antonovka’ and new scab resistant cultivar ‘Gita’ were evaluated on dwarfing rootstock B.396. The presence of four common apple viruses (apple mosaic virus (ApMV), ACLSV, apple stem grooving virus (ASGV), apple stem pitting virus (ASPV)) was assayed in the planting year and repeated at the end of the study period. The vigour of planting material, growth, yield, and yield efficiency were compared between virus negative and ACLSV-infected trees. During eight growing seasons (2013–2020), no statistically significant negative impact of ACLSV infection on tree growth or yield was observed for the cultivars. A larger canopy volume was observed for ACLSV-infected trees (p = 0.01), but the cumulative yield per canopy volume was equivalent between virus-negative trees and ACLSV-infected trees (p = 0.07).

Evaluation of Apple Chlorotic Leaf Spot Virus Impact on Fruit Yield and Vegetative Growth in Apple Cultivars ‘Antonovka’ and ‘Gita’

Latvia University of Life Sciences and Technologies

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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

The negative influence of pathogens on plant development is well known. However, the negative impact depends on various factors: cultivar and rootstock...

Evaluation of Apple Chlorotic Leaf Spot Virus Impact on Fruit Yield and Vegetative Growth in Apple Cultivars ‘Antonovka’ and ‘Gita’

Published Online: Oct 14, 2022

Page range: 495 - 499

Received: Aug 26, 2021

Accepted: Jul 15, 2022

DOI: https://doi.org/10.2478/prolas-2022-0076

Keywords
canopy volume, cumulative yield, trunk cross-sectional area, ACLSV

© 2022 Neda Zuļģe et al., published by Sciendo

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

Evaluation of Apple Chlorotic Leaf Spot Virus Impact on Fruit Yield and Vegetative Growth in Apple Cultivars ‘Antonovka’ and ‘Gita’

Published Online: Oct 14, 2022

Page range: 495 - 499

Received: Aug 26, 2021

Accepted: Jul 15, 2022

DOI: https://doi.org/10.2478/prolas-2022-0076

Keywordscanopy volume, cumulative yield, trunk cross-sectional area, ACLSV

© 2022 Neda Zuļģe et al., published by Sciendo

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

Keywords
canopy volume, cumulative yield, trunk cross-sectional area, ACLSV