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Wrong biocide treatment could do more harm than good. The Case of the Lascaux Cave in France

The Lascaux Cave in France suffered an outbreak of the fungus Fusarium solani in 2001. Biocides were applied for three years to control this outbreak. Four months after the initial biocide application, a new outbreak appeared in the form of black stains that progressively invaded the cave. The study published in "Environmental Science and Technology" investigated the fungal communities associated with the black stains and the effectiveness of the biocides applied, The origin and evolution of these microorganisms are probably linked to the intensive biocide treatments and to the anthropogenic changes introduced by cave management.

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