Fig. 2

Variation in wing shape associated with the two first axes of a principal component analysis (PCA) performed on the whole dataset for female and male T. infestans. Black symbols indicate the control group; grey symbols indicate the deltamethrin-treated group. The changes in shape associated with the first two axes of the PCA are visualised as configurations corresponding to extreme positions of the axes. Black indicates configuration for negative extreme scores; grey indicates configuration for positive extreme scores. Shape changes correspond to an arbitrary value of 2.5 standard deviations