## 3 Results and Discussion  
### Statistical Analysis  
The GC-MS results are illustrated in Table 1, and reported as the means of triplicate analysis. The data obtained were subjected to one-way analysis of variance (ANOVA) to assess the significance of quantitative changes in the variables as a result of the concentrations of the chemical constituents of the essential oils harvested during the three months of March, June, and September (Table 2). Statistical analysis was performed by the Statistical Package for Social Science (IBM SPSS Statistics 23.0, Chicago, IL, USA). \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{\(\mathbf{N}^{\circ}\)} & \multirow{2}{*}{**Kovats Indices**} & \multirow{2}{*}{**Components**} & \multicolumn{4}{c}{**(\%) of Components**} \\ \cline{3-6}  & & & **March** & **June** & **September** \\ \hline
1 & 926 & tricyclene & — & 0.13 & 0.10 \\
2 & 929 & artemisinin triene & 0.75 & 0.73 & **1.73** \\
3 & 931 & \(\alpha\)-thujene & — & 0.06 & 0.16 \\
4 & 943 & \(\alpha\)-pinene & **2.28** & **4.08** & 1.56 \\
5 & 953 & camphene & 0.09 & 0.14 & 0.16 \\
6 & 968 & sabinene & 1.60 & 0.59 & **3.05** \\
7 & 972 & \(\beta\)-pinene & 0.10 & 0.26 & 0.18 \\
8 & 974 & cis-pinene & — & 0.19 & 0.08 \\
9 & 986 & myrcene & 0.53 & 0.11 & 0.91 \\
10 & 1005 & \(\alpha\)-phellandrene & — & — & 0.08 \\
11 & 1012 & \(\alpha\)-terpinene & 0.09 & 0.13 & 0.18 \\
12 & 1022 & ortho-cymene & 0.33 & 0.51 & 0.34 \\
13 & 1031 & limonene & 0.19 & 0.11 & 0.17 \\
14 & 1033 & **1,8-cineole** & 1.54 & **11.71** & **11.77** \\
15 & 1050 & E- \(\beta\)-ccimene & 0.15 & 0.51 & 0.30 \\
16 & 1062 & \(\gamma\)-terpinene & 0.11 & 0.08 & 0.06 \\
17 & 1062 & artemisinin ketone & 0.31 & 0.82 & 0.12 \\
18 & 1095 & \(\alpha\)-pinene oxide & 0.19 & — & 0.13 \\
19 & 1098 & sabinene trans hydrate & — & 0.26 & 0.65 \\
20 & 1101 & \(\alpha\)**-thujone** & **4.77** & **3.06** & **5.37** \\
21 & 1112 & \(\beta\)**-thujone** & **23.24** & **12.85** & **15.36** \\
22 & 1118 & trans-pinan-2-ol & 0.45 & 0.29 & 0.28 \\
23 & 1123 & **chrysanthenone** & 2.41 & 1.00 & **13.98** \\
24 & 1134 & terpinol & 2.13 & 1.33 & 0.94 \\
25 & 1140 & **camphor** & **9.76** & **14.31** & **5.8** \\
26 & 1156 & \(\beta\)-pinene oxide & 0.17 & 0.12 & 0.08 \\
27 & 1158 & **trans \(\beta\)-dihydro terpineol** & **7.77** & **7.18** & **6.85** \\
28 & 1163 & trans \(\beta\)-terpineol & 1.54 & 1.72 & 0.47 \\
29 & 1177 & terpinen-4-ol & 0.52 & 0.53 & 0.55 \\
30 & 1181 & thuj-3-en-10-al & 0.11 & 0.06 & 0.09 \\
31 & 1183 & \(p\)-cymen-8-ol & — & 0.11 & 0.04 \\
32 & 1189 & \(\alpha\)-terpineol & 0.22 & 0.33 & 0.13 \\
33 & 1205 & trans piperitol & 0.20 & 0.29 & 0.07 \\
34 & 1206 & \(p\)-cymen-9-ol & — & 0.10 & 0.22 \\
35 & 1235 & trans chrysanthenyl acetate & 0.15 & 0.10 & 0.10 \\
36 & 1252 & piperitone & 0.19 & 0.26 & 0.16 \\
37 & 1258 & **cis chrysanthenyl acetate** & **30.02** & **26.73** & **27.63** \\
38 & 1271 & neo-3- thuiyl acetate & — & — & 0.13 \\
39 & 1281 & \(\alpha\)-terpinen-7-al & 0.18 & 0.32 & — \\
40 & 1287 & \(\gamma\)-terpineol -7-al & 1.28 & 0.92 & 0.68 \\
41 & 1347 & \(\alpha\)-terpinyl acetate & — & 0.28 & 0.44 \\
42 & 1391 & \(\beta\)-elemene & 0.31 & 0.13 & 0.16 \\
43 & 1418 & E-caryophyllene & — & 0.10 & — \\
44 & 1467 & 9-epi E-caryophyllene & 0.63 & 0.60 & 0.45 \\
45 & 1477 & \(\hat{\alpha}\)-muutrolene & — & 0.15 & — \\ \hline \end{tabular}
\end{table} 
Table 1: Chemical composition of Artemisia herba-alba essential oils (March, June, and September).