Table II.

Volatiles emitted by tomato plants

CompoundCalculated IK Total Emission by Control PlantsTotal Emission by Spider Mite-Infested PlantsP-Value (Infested Plants Versus Control Plants)
μg/plant/5 dμg/plant/5 d
β-myrcene988.10.008 ± 0.0080.02 ± 0.020.558
2-carene1000.00.1 ± 0.10.5 ± 0.30.247
α-terpinene1017.50.0003 ± 0.00030.03 ± 0.031.000
p-cymene1022.31.1 ± 0.80.2 ± 0.10.144
β-phellandreneA1025.019.5 ± 5.819.6 ± 5.60.757
limonene1029.75.0 ± 3.03.4 ± 1.80.374
trans-β-ocimene1046.90.1 ± 0.081.2 ± 0.30.001*
γ-terpinolene1089.30.6 ± 0.30.4 ± 0.20.721
linalool1097.60.1 ± 0.030.5 ± 0.10.001*
DMNT1114.10.6 ± 0.31.0 ± 0.40.221
MeSA1198.837.6 ± 11.1144.2 ± 56.80.001*
δ-elemeneA1338.60.9 ± 0.31.3 ± 0.40.341
α-cubebene1353.60.01 ± 0.0060.04 ± 0.020.577
α-copaene1380.02.7 ± 1.43.2 ± 1.00.597
β-elemeneA1393.61.4 ± 0.61.7 ± 0.50.634
longifoleneA1415.70.8 ± 0.21.2 ± 0.30.644
β-caryophyllene1429.62.6 ± 0.63.8 ± 0.80.224
α-gurjuneneA1434.23.3 ± 1.64.5 ± 2.10.610
β-farnesene1450.80.2 ± 0.10.2 ± 0.050.255
α-humulene1462.82.1 ± 1.12.1 ± 1.40.731
γ-muuroleneA1477.51.0 ± 0.31.0 ± 0.20.733
α-muuroleneA1499.33.0 ± 1.22.8 ± 1.60.362
tert-butylphenolA1500.96.1 ± 2.68.0 ± 2.40.851
cis-nerolidol1527.70.3 ± 0.070.4 ± 0.10.277
Unk. sesquiterpene AA1538.33.5 ± 1.76.2 ± 2.40.102
Unk. sesquiterpene BA1551.42.5 ± 1.13.9 ± 1.60.598
trans-nerolidol1560.00.4 ± 0.050.9 ± 0.20.004*
TMTT1572.9342.9 ± 170.1690.0 ± 218.50.050*
cis,cis-farnesolA1720.71.4 ± 0.71.9 ± 0.60.360
  • Compounds in the table are ordered according to their calculated Kovats index (IK). The compounds marked with A were not available as pure standards and therefore the amounts for these compounds have been estimated on the basis of the nearest compound on the RT-scale of the GC-spectrum, provided this compound was of the same chemical class and a pure standard was available. The values indicate the means and ses of each treatment group. The P-values have been calculated per compound with one-way ANOVA (df = 1) on the total amount produced per plant in 5 d (n = 9). The compounds that are marked with an asterisk (*) tested significantly different (F ≥ 7.2/P ≤ 0.05) for infested plants versus control plants.