## 3 Results and Discussion
### Volatile Emissions from Vegetative-Stage, Greenhouse Grown Soybean
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multicolumn{2}{c}{**GC**} & \multicolumn{2}{c}{**Compound**} & \multicolumn{2}{c}{**CAS**} & \multicolumn{2}{c}{**MS**} & \multicolumn{2}{c}{**Boue**} & \multicolumn{2}{c}{**Rosario**} & \multicolumn{2}{c}{**Damiani**} & \multicolumn{1}{c}{**Zhu and**} \\ \multicolumn{2}{c}{**column**} & & & **spectral** & _et al._ & _et al._ & _et al._ & _et al._ & **Park** \\ \multicolumn{2}{c}{**RT**} & & & **match** & **[10]** & **beans** & **-** & **[11]** \\ \multicolumn{2}{c}{**(min)**} & & & **(\%)** & **beans** & **beans** & **leaves** \\ \hline
1 & 2.06 & Acetic acid, methyl ester & 79-20-9 & 35 & y & y & & \\ \hline
2 & 3.25 & Butanal, 2-methyl- & 96-17-3 & 74 & & y & & \\ \hline
3 & 3.96 & 2,4-Hexadienal & 142-83-6 & 63 & y & & \\ \hline
4 & 4.16 & Propanentifile, 2-methyl- & 78-82-0 & 83 & & & \\ \hline
5 & 4.36 & Trimethylsilanol & 1066-40-6 & 69 & & & \\ \hline
6 & 4.81 & 1-Penten-3-one & 1629-58-9 & 38 & & y & \\ \hline
7 & 5.45 & Butanoic acid, 2-methyl-, methyl ester & 868-57-5 & 88 & & & \\ \hline
8 & 5.70 & Propane, 1-chloro-2-methyl- & 513-36-0 & 28 & & & \\ \hline
9 & 6.01 & Butanedinitrile, 2,3-dimethyl- & 16411-13-5 & 82 & & & \\ \hline
10 & 6.23 & 2-Propanol, 2-methyl- & 75-65-0 & 35 & y & & \\ \hline
11 & 6.65 & Hexanal * & 66-25-1 & 88 & y & y & y \\ \hline
12 & 7.05 & 3,4-Dihydropyran & 110-87-2 & 39 & & & \\ \hline
13 & 7.23 & 1-Penten-3-ol & 616-25-1 & 79 & & y & \\ \hline
14 & 8.13 & 1-Butanol-, acetate & 123-92-2 & 85 & y & & \\ \hline
15 & 8.26 & 1-Butanol, 3-methyl- * & 123-51-3 & 76 & y & & \\ \hline
16 & 9.21 & cis-3-Hexenal & 6789-80-6 & 68 & & & \\ \hline
17 & 9.00 & 1-Butanol, 2-methyl- & 137-32-6 & 31 & & y & \\ \hline
18 & 9.00 & Cyclobutanone, 2, 2-dimethyl- & 1192-14-9 & 68 & & & \\ \hline
19 & 10.58 & trans-2-Methyl-1, 3-pentadiene & n/a & 79 & & & \\ \hline
20 & 11.16 & 3-Octanone * & 106-68-3 & 93 & y & y & \\ \hline
21 & 11.48 & cycloproane, propyl- & 2415-72-7 & 74 & & & \\ \hline
22 & 11.65 & 3-Hexen-1-ol & 928-97-2 & 69 & y & y & y \\ \hline
23 & 11.98 & cis-3-Hexen-1-ol & 928-96-1 & 95 & & & y \\ \hline
24 & 12.15 & **cis-3-Hexen-1-ol, acetate** & 3681-71-8 & 76 & & y & y \\ \hline
25 & 12.58 & 1,3-Pentadiene, 2-methyl- & 926-54-5 & 83 & & & \\ \hline
26 & 12.88 & 3-Octanol * & 589-98-0 & 83 & y & y & \\ \hline
27 & 13.30 & Acetic acid * & 64-19-7 & 74 & & y & \\ \hline
28 & 13.61 & 1-Octen-3-ol & 3391-86-4 & 83 & y & y & y \\ \hline
29 & 14.21 & Oct-1-en-3-one & 50306-18-8 & 72 & & & \\ \hline
30 & 14.58 & Cyclopropene, 3,3-diethyl- & 78578-86-6 & 33 & & & \\ \hline
31 & 14.95 & Benzaldehyde* & 100-52-7 & 93 & y & y & y \\ \hline
32 & 15.23 & gamma, Heptalactone & 105-21-5 & 24 & & & \\ \hline
33 & 15.80 & Linalool & 78-70-6 & 31 & & y \\ \hline
34 & 16.13 & 2 [5H]-Furanone, 5-ethyl- & 2407-43-4 & 50 & & \\ \hline
35 & 16.41 & Benzene, isocyano- & 931-54-4 & 68 & & \\ \hline
36 & 16.40 & Malonic acid bis-( 2-trimethylsilanyl-ethyl ester) & 90744-45-9 & 31 & & \\ \hline
37 & 16.80 & Thiophene, 2-pentyl- & 4861-58-9 & 24 & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Preliminary identification of compounds emitted from soybean leaves growing in greenhouse. Twelve of these compounds were positively identified with reference standards, all others were identified by spectra library matches with 25 of those compounds having spectral library matches of 70% or more. Thirty-nine of the compounds in Table 2 have never been reported previously in studies of soybean volatile emissions [10, 11, 12, 13]. Only 11 compounds were previously reported as those emitted from soybean leaves. Of the identified compounds, nine (3-hexen-1-ol, dimethyl nonatriene, indole, caryophyllene, benzaldehyde,linalool, MeSA, benzene ethanol, and farnesene) are considered herbivore-induced plant volatiles (HIPV). Of the compounds that are considered HIPV, only MeSA was more abundant on the _A. glycines_ infested plants. Significantly more MeSA was produced by _A.