The application protocol impacts the effectiveness of biocides against lichens

Sonia Ravera, Enrica Matteucci, Paola Malaspina, Andrea Vannini, Paolo Giordani, Zuzana Fačkovcová, Elisabetta Bianchi, Chiara Tonon, Luca Paoli, Renato Benesperi, Ada Roccardi, Luca Martire, Luca Paoli, Stefano Loppi, Sergio E. Favero-Longo

Risultato della ricerca: Articlepeer review

Abstract

This work analyzed the influence of different application protocols on the efficacy of two biocides against the foliose lichen Xanthoparmelia tinctina on the sandstones of the Roman Archaeological site of Luni (Italy). The hypotheses that (a) biocide application tools (brush vs. poultice), (b) pre-treatment hydration, and (c) post-treatment washing may affect devitalization success were verified by monitoring chlorophyll a fluorescence of thalli, both in situ and in laboratory conditions. The hypothesis that (d) stone substrate may act as reservoir for later biocide release under repeated cycles of wetting and drying was also assayed. Analyses confirmed the importance of the application tool, with cellulose poultice being more effective than brush. Hydration influenced the biocide absorption by thalli. Moreover it modulated the metabolic activity and susceptibility to the available toxic compound, hindering lichens from entering a dormant state to tolerate stress. Depending on the preparation solvent (water vs. white spirit), the biocide application benefited from pre-treatment hydration and/or a post-treatment washing. Lastly, we showed that different sandstones variously adsorb the biocides and potentially contribute as a reservoir for their long-term release at low concentrations during successive hydration events.
Lingua originaleEnglish
pagine (da-a)1-9
Numero di pagine9
RivistaINTERNATIONAL BIODETERIORATION & BIODEGRADATION
Volume155
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.2500.2502???
  • ???subjectarea.asjc.2300.2311???

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