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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
(a) Double-plate assay for the detection of volatile inhibitory compounds produced by rhizobacteria against R. solanacearum under in vitro conditions; (b) lateral view of sealed plates carrying antagonists in the lower plate and pathogens in the upper plate.