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February 2, 2026Journal of Phytopathology0 citations

Temporal Dynamics of Neonectria Ditissima Spore Release in Apple Cultivars

Temporal Dynamics of Neonectria ditissima Spore Release From Whole and Shredded Branches of ‘Gala’ and ‘Fuji’ Apple Cultivars

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Authors

MPMarilia Feliciano Goulart PereiraDRDaiana Petry RufatoLRLeo André Rufato

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Overview

Monitoring spore release from branches of 'Gala' and 'Fuji' apples, indicating challenges for managing European canker.

Key Points

  • This study aims to investigate the spore release dynamics of Neonectria ditissima from whole and shredded apple branches.
  • Monitored spore release from whole and shredded branches of 'Gala' and 'Fuji' apple trees during 2023-2025.
  • Placed branches in spore-trap boxes to quantify airborne ascospores and conidia weekly.
  • Shredded branches using a hydraulic mower before monitoring spore release.
  • Ascospores were the dominant spore type, showing higher release than conidia.
  • Whole symptomatic branches yielded the highest spore release, particularly in 'Gala'.
  • Shredding reduced spore output but did not eliminate inoculum viability, with shredded branches still releasing spores.
  • Both symptomatic and asymptomatic branches released spores, indicating latent infections.
  • Spore-release peaks coincided with rainy periods, highlighting moisture's role in spore discharge.
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Cite This Study

Pereira et al. (2026) studied this question.

synapsesocial.com/papers/6980fe13c1c9540dea80fe68https://doi.org/10.1111/jph.70246
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