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Panel (a) shows the Biplot Analysis for Principal Component Analysis (PCA) of volatile compounds emitted from potted lychee plants under different levels of LEM infestation (A1 to A5). Panel (b) shows the Agglomerative Hierarchical Cluster (AHC) analysis for LEM infestation samples A1 to A5 based on selected volatile active compounds. Initial infestation (A1), intermediate infestation (A2), heavy infestation (A3), overexploitation (A4), and healthy, uninfested plant (A5).
