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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 (http://creativecommons.org/licenses/by/4.0/).
The control effect of PCA on tobacco inoculated with R. solanacearum. The bars indicate the standard error of the mean of three replicates. * indicates a significant difference between treatments (independent-samples T test, p < 0.05).