## 3 Results
\begin{tabular}{c c} \hline \hline
**Results by Cluster** & **Cluster 2** \\ \hline Objects & A1, A3, A5 & A2, A4 \\ \hline Sum of weights & 3 & 2 \\ \hline Within-class variance & 270.81 & 59.25 \\ \hline Maximum distance & 17.97 & 5.44 \\ to centroid & & \\ \hline  & sabinene (3.90), limone (6.54), (_E_)-\(\beta\)-ocimene (1.00), \(\alpha\)-copaene (2.04), & \\  & nonanal (41.45), decanal (6.87), & \\ Cluster centroids \textgreater{} 1.0 & 7-_epi_-sesquithuene (1.43), tetradecane (2.06), \(\beta\)-caryophylllene (7.08), & \\  & _trans_-\(\alpha\)-bergamotene (0.76), & \\  & _ar_-curcumene (17.95), \(\alpha\)-zingiphere (1.03), & \\  & hexadecane (1.46), heptadecane (2.37) & \\ \hline \hline \end{tabular} \begin{tabular}{c c} \hline \hline
**Results by Cluster** & **Cluster 1** & **Cluster 2** \\ \hline Objects & A1, A3, A5 & A2, A4 \\ \hline Sum of weights & 3 & 2 \\ \hline Within-class variance & 270.81 & 59.25 \\ \hline Maximum distance & 17.97 & 5.44 \\ to centroid & & \\ \hline  & sabinene (3.90), limone (6.54), (_E_)-\(\beta\)-ocimene (1.00), \(\alpha\)-copaene (2.04), & \\  & nonanal (41.45), decanal (6.87), & \\ Cluster centroids \textgreater{} 1.0 & 7-_epi_-sesquithuene (1.43), tetradecane (2.06), \(\beta\)-caryophylllene (7.08), & \\  & _trans_-\(\alpha\)-bergamotene (0.76), & \\  & _ar_-curcumene (17.95), \(\alpha\)-zingiphere (1.03), & \\  & hexadecane (1.46), heptadecane (2.37) & \\ \hline \hline \end{tabular} \begin{tabular}{c c} \hline \hline
**Results by Cluster** & **Cluster 2** \\ \hline Objects & A1, A3, A5 & A2, A4 \\ \hline Sum of weights & 3 & 2 \\ \hline Within-class variance & 270.81 & 59.25 \\ \hline Maximum distance & 17.97 & 5.44 \\ to centroid & & \\ \hline  & sabinene (3.90), limone (6.54), (_E_)-\(\beta\)-ocimene (1.00), \(\alpha\)-copaene (2.04), & \\  & _trans_-\(\alpha\)-bergamotene (0.76), & \\  & _ar_-curcumene (17.95), \(\alpha\)-zingiphere (1.03), & \\  & hexadecane (1.46), heptadecane (2.37) & \\ \hline \hline \end{tabular} \begin{tabular}{c c} \hline \hline
**Results by Cluster** 2** \\ \hline Objects & A1, A3, A5 & A2, A4 \\ \hline Sum of weights & 3 & 2 \\ \hline Within-class variance & 270.81 & 59.25 \\ \hline Maximum distance & 17.97 & 5.44 \\ to centroid & & \\ \hline  & sabinene (3.90), limone (6.54), (_E_)-\(\beta\)-ocimene (1.00), \(\alpha\)-copaene (2.04), & \\  & _trans_-\(\alpha\)-bergamotene (1.02), \(\beta\)-ocimene (1.02), \(\gamma\)-terpinene (1.05), (_E_)-\(\beta\)-ocimene (1.02), \(\gamma\)-terpinene (1.05), (_E_), nonanal (21.36), decanal (2.56), \\  & _7-epi_-sesquithuene (1.43), tetradecane (2.06), \(\beta\)-caryophylllene (7.08), & tetradecane (1.77), \(\beta\)-caryophylllene (7.02), \\  & _trans_-\(\alpha\)-bergamotene (0.76), & \\  & _ar_-curcumene (17.95), \(\alpha\)-zingiphere (1.03), & \\  & hexadecane (1.46), heptadecane (2.37) & \\ \hline \hline \end{tabular} 
\begin{tabular}{c c} \hline \hline
**Results by Cluster** & **Cluster 1** & **Cluster 2** \\ \hline Objects & A1, A3, A5 & A2, A4 \\ \hline Sum of weights & 3 & 2 \\ \Cos2 values from field-collected (non-infested) lychee tissues (B1 to B4) on the F1 axis were strongly correlated with (\(E\))-\(\beta\)-ocimene (0.84), cyclosativene (0.92), \(\alpha\)-copaene (0.96), \(\beta\)-caryophyllene (0.97), _trans_-\(\alpha\)-bergamotene (0.92), \(\alpha\)-humulene (0.95), _ar_-curcumene (0.82), \(\alpha\)-zingiberene (0.97) and \(\beta\)-sesquiphellandrene (0.84), which contributed 5.34%, 5.85%, 6.12%, 6.15%, 5.85%, 6.03%, 5.23%, 6.19%, and 5.34%, respectively, while cos2 values on the F2 axis strongly correlated with \(\alpha\)-ylangene (0.98), \(\gamma\)-muurolene (0.99), (\(E\),\(E\))-\(\alpha\)-farnesene (0.82), which contributed 13.90%, 14.16%, and 11.64%, respectively (Table 6). AHC was performed on the volatile composition obtained from field-collected samples B1 to B4. Samples of floral buds (B1), leaf buds (B3), and new leaf shoots (B4) were grouped into the same cluster, in agreement with the PCA results, while the open flower sample (B2) was clustered alone (Figure 4b).