## 2 Results and Discussion
sambucinum_ (Table S1 and Table 3). Apart from terpen, other fungal origin compounds were found, including hydrocarbons, acids, ketones, and alcohols (2019; 2019; 2019; 2019; 2020; 2021; 2022). In the samples inoculated with _C. cocodes_ and _R. solani_, a methylated derivative of benzene, i.e., 1,2,4-trimethylbenzene was detected, which was not found  
Figure 2: Dendrogram from the hierarchical clustering analysis (HCA). Fo—_F. oxysporum_; Fs—_F. sambucinum_; Aa—_A. alternata_; As—_A. solani_; At—_A. tenuissima_; Rs—_R. solani_; Cc—_C. cocodes_; Pe—_P. exigua_; S—_S. scabiei_; Fc—_P. carovorum_. in other samples, including the control. Production of various hydrocarbons by fungi has been reported previously [55]. 2,6,11-trimethyldodecane, in turn, was detected only in the sample contaminated with _A. tenuissima_ (Table S1). In addition, benzothiazazole was a volatile marker of the growth of _A. tenuissima_ on potato tubers. [PERSON] et al. [45] noticed the largest peak of benzothiazazole in the headspace of potato tubers infected with _Fusarium ceruleum_ and _Phyophthora infestans_. From the observations, two alcohols, i.e., 3-octanol and 2-butanol can be associated with the growth of the phytopathogens namely _F. sambucinum_ and _P. carorotorum_, respectively. The species of _Fusarium_ have been identified to produce alcohols, which can be used as biomarkers for these fungi [6]. The acetic acid, in turn, was present in all infected samples; however, relative to the control sample before storage, its content increased from 2.04% of the total peak area to 19.97 (_R. solanti_), 16.45 (_A. solanti_), 11.91 (_S. scabiei_), 10.79 (_P. exigua_), 9.31 (_A. alternata_), and 7.54 (_C. cocodes_) % of total peak area. However, acetic acid was not detected after storing the control sample. Among ketones determined in the tested samples, spiro[3.4]octan-5-one (_F. sambucinum_), 3-octanone (_C. cocodes_), and 1-octen-3-one (_A. solani_) can be regarded as the markers of phytopathogen pattern on potato tubers. These organics were identified as volatile compounds produced by _Muscodor authepensis_[56], _Alternaria alternata_[50], and _Rhizoctonia solani_ and _Trichoderma viride_[57]. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Marker of Pathogen Infestation** & **Compound Name** & **Origin * (M/P)** \\ \hline \multirow{6}{*}{All pathogens: _F. oxysporum; F. sambucinum; AL. alternata; A. solanti_; A. lentuissima; R. solanti; C. cocodes; P. exigua; S. scabiei; P. carotovorum. P. carotovorum. P. carotovorum. & Acetic acid (no. 60) & M [7; 45; 50; 58]; P [58] \\  & & \(\alpha\)-Pinene (no. 128) & M [7; 44; 52; 59]; P [58] \\  & 1-Methyl-3-propylbenzene (no. 13; with exception of _A. alternata_), & M [60] \\  & Decanal (no. 72; with exception of _P. carotovorum_) & M [7] \\  & Methylbenzene (no. 101) & P [58; 61] \\  & Nonanal (no. 106) & M [45] \\  & p-Xylene (no. 119) & M [7; 58]; P [58] \\  & p-Cymene (no. 111) & M [7] \\ \hline \multirow{6}{*}{_F. oxysporum_} & 2-Methylheptane (no. 35) & M [53] \\  & 2-Methylhexane (no. 36) & M [61] \\  & 3-Methylhexane (no. 52) & M [61] \\  & 1-Ethyl-4-methylbenzene (no. 12) & \# \\  & Cyclohexane (no. 68) & M [61] \\  & Cyclohexanone (no. 69) & M [35] \\  & 2,4-Dimethylhexane (no. 24) & M [7] \\  & 4-Heptanone (no. 57) & M [50] \\  & 1,2,3,-Trimethylcyclopentane (no. 6) & \# \\  & 3-Methyloctane (no. 53) & M [61] \\ \hline \multirow{6}{*}{_F. sambucinum_} & Valence (no. 125) & M [7] \\  & 3-Octanol (no. 54) & M [7] \\  & \(\alpha\)-Cubebene (no. 126) & M [7] \\  & \(\alpha\)-Guaiene (no. 127) & M [7] \\  & Spiro[3.4]octan-5-one (no. 120) & M [56] \\  & Chamigrene (no. 66) & M [7; 51] \\  & (+)-epi-Bicyclosesquiphellandrene (no. 2) & M [7; 43] \\  & Naphtalene (no. 105) & M [7] \\  & Acenapthene (no. 59) & M [62] \\  & Dimethyl disulfide (no. 77) & M [5; 7; 63; 64; 65]; P [58] \\  & 1-Methyl-4-propylbenzene (no. 14) & \# \\  & 1-Methylinaphtalene (no. 15) & M [52; 65] \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Volatile compounds as markers of potato pathogens infestation.