Advancing barley protection: a study of UV-C light sources against powdery mildew (Blumeria graminis f. sp. hordei)

Autor: Hahlbohm, Aileen ; Struck, Christine ; de Mol, Friederike ; Dobers, Eike Stefan ; Strehlow, Becke
In:

Journal of Plant Pathology

ISBN: 2239‑7264
DOI: https://doi.org/10.1007/s42161-025-01970-7
Seite: 1 - 13
Jahr: 2025

Einordung:
Institut: Professur Phytomedizin

Abstract:
New alternatives to protect plants against fungal pathogens are needed to prevent yield losses. It is established that UV-C has a disinfecting effect against a variety of microorganisms, including fungi. Furthermore, UV-C radiation can stimulate
plants’ defense. Blumeria graminis f. sp. hordei, the causal agent of powdery mildew in barley, is at high risk of developing resistance to fungicides and overcoming host resistance. This study investigated the effects of UV-C treatment before
and after inoculation with B. graminis to ascertain the effects of stimulating plant’s defense and the effects of UV-C treatment direct on B. graminis. The efficacy of low pressure mercury vapor lamps (Hg) with a peak of 254 nm and LED lamps with a peak between 263 and 275 nm was evaluated under variable application times and dosages. Results indicated no significant visible effects when plants were irradiated before inoculation. However, the direct treatment of spores showed reduced germination in vitro. Furthermore, the treatment of leaves after inoculation demonstrated a reduction in pustule numbers of up to 98% (at a dose of 0.45 kJ/m2), as well as a decrease in pustule size. Efficacy was enhanced with increasing dosages. The efficacy of the treatment is contingent upon the dosage, timing of application, and source of UV-C radiation. The LED UV-C treatment was more effective than the Hg UV-C treatment. The results of this study indicate that UV-C treatment could be an alternative crop protection measure against B. graminis.

Ansprechpartner

 

 

Zur Publikation: Mitarbeiter, Projekte
Weitere Publikationen im Forschungsteilschwerpunkt

 

 

 

 

Letzte Änderung des Eintrages: 23.02.2026
Suche :
Datenbanksuche Publikation (in Titel, Autor, Beschreibung)