Table 1 Volatiles collected from the headspace of undamaged Bt rice plants (Bt UD), undamaged non-Bt rice plants (non-Bt UD), herbivore C. suppressalis-damaged Bt rice plants (Bt HD) and herbivore-damaged non-Bt plants (non-Bt HD).

From: Bt rice does not disrupt the host-searching behavior of the parasitoid Cotesia chilonis

Peak no.

Plant volatile

Retention time (min)

Mean quantities of volatiles*

Bt UD

Non-Bt UD

Bt HD

Non-Bt HD

1

2-heptanone

5.14

28 ± 6 a

11 ± 4 a

331 ± 117 b

163 ±43 b

2

2-heptanol

5.34

14 ± 4 a

10 ± 3 a

232 ± 57 b

107 ± 23 b

3

unknown 1

5.84

–

–

8 ± 1 a

6 ± 1 a

4

α-piene

5.98

8 ± 2 a

10 ± 3 a

9 ± 1 a

16 ± 4 a

5

unknown 2

8.23

–

–

6 ± 1 a

5 ± 1 a

6

D-limonene

8.31

33 ± 4 a

26 ± 4 a

238 ± 30 b

204 ± 40 b

7

unknown 3

9.09

4 ± 0 a

4 ± 0 a

8 ± 1 a

6 ± 1 a

8

unknown 4

9.38

–

–

5 ± 1 a

6 ± 1 a

9

2-nonanone

9.97

–

–

89 ± 23 a

40 ± 5 a

10

linalool

10.21

163 ± 38 a

104 ± 22 a

180 ± 52 a

144 ± 36 a

11

methyl salicylate

12.41

–

–

51 ± 38 a

36 ± 18 a

12

copaene

16.44

4 ± 1a

5 ± 1 a

18± 2 b

23 ± 5 b

13

β-caryophyllene

17.41

6 ± 1 a

8 ± 2 a

11 ± 3 a

13 ± 3 a

14

α-bergamotene

17.74

–

–

5 ± 2 a

5 ± 1 a

15

germacrene D

18.67

–

–

9 ± 2 a

12 ± 2 a

16

2-tridecanone

19.07

–

–

64 ± 21 a

25 ± 7 a

17

δ-selinene

19.54

4 ± 1 a

6 ± 2 a

27 ± 5 b

31 ± 8 b

18

α-cedrene

19.70

–

–

16 ± 8 a

26 ± 6 a

 

Total

 

251 ± 44 a

167 ± 29 a

1145 ± 256 b

805 ± 93 b

  1. “−” indicates that the concentration of the volatile was below the detection level.
  2. *Values are mean normalized quantities of volatiles (%) =   ± SE of seven to 10 replicates. Means with the different letters in the same row are significantly different (P < 0.05, Tukey HSD test). Data were log10(x + 1) transformed before analysis.
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