Evaluation of Nematocidal Action against Caenorhabditis elegans of Essential Oil of Flesh Fingered Citron and Its Mechanism

Table 1

Major components from the essential oil of fingered citron.

No.	Constituent	Retention index^a	Percentage^b
	Monoterpene hydrocarbons
1	α-Thujene	919	1.31
2	α-Pinene	931	2.88
3	β-Pinene	980	2.69
4	α-Phellandrene	1005	0.26
5	δ-3-Carene	1015	0.30
6	α-Terpinene	1019	0.23
7	D-Limonene	1032	43.39
8	γ-Terpinene	1066	18.57
9	Terpinolene	1087	1.44
10	β-Myrcene	987	1.77
11	(Z)-β-Ocimene	1045	1.46
12	2-Carene	1018	0.31
13	β-Phellandrene	964	0.38
	Sesquiterpene hydrocarbons
14	β-Caryophyllene	1425	0.19
15	(S)-β-Bisabolene	1485	0.46
16	α-Bergamotene	1437	0.33
17	Germacrene D	1485	0.032
	Oxygenated monoterpenes
18	Linalool	1095	0.13
19	trans-Limonene oxide	1139	0.12
20	Terpin-4-ol	1183	0.28
21	α-Terpineol	1196	0.43
22	Neral	1235	0.23
23	Nerol	1229	0.051
24	Geranial	1263	0.28
25	Neryl acetate	1349	0.039
26	Geranyl acetate	1368	0.032
27	Geraniol	1252	0.28
28	cis-Limonene oxide	1138	0.079
29	(Z)-Carveol	1222	0.061
30	Thymol	1292	0.017
	Oxygenated sesquiterpenes
31	Caryophyllene oxide	1612	0.13
32	Spathulenol	1604	0.061
	Nonisoprenoid components
33	Decanal	1200	0.032
Total			78.25

^aRelative to C₅–C₂₅n-alkanes calculated from a nonpolar HP-5MS™ capillary column. ^bBased on FID peak area normalization.