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. 2017 Aug 31;12(8):e0184243. doi: 10.1371/journal.pone.0184243

Fig 3. Principal components analysis (PCA) of CHC profiles of the 3rd instar nymphs, wingless and winged adults of A. pisum.

Fig 3

The GNY morph was used for direct SPME sampling with 7 μm PDMS fiber. Shown are score plots of PC 1 versus 2, with the percentage of total variance explained by each axis given in parentheses. Each symbol represents an aphid individual. Data points for each group are enclosed within a line.