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Table 4 Acids and aldehydes contents (µg L−1) of harvested apples of protective applications of individuals and combinations of EOs against B. Cinerea (X ± SE)

From: Volatile organic compounds produced by some synthetic essential oils as biological fumigants against Botrytis cinerea on apples

Compounds

CT

Fun

Thy + Fun

Cin + Fun

Eug + Fun

Cin + Eug + Fun

Thy + Eug + Fun

Thy + Cin + Fun

Thy + Cin + Eug  + Fun

p-value

Acids

 Hexanoic acid

0.1 ± 0.0ns

0.1 ± 0.0

0.1 ± 0.0

0.1 ± 0.0

0.0 ± 0.0

0.1 ± 0.0

0.1 ± 0.0

0.1 ± 0.0

0.1 ± 0.0

0.3015

 2-Hexenoic acid

0.2 ± 0.0ns

0.2 ± 0.0

0.2 ± 0.0

0.2 ± 0.0

0.2 ± 0.0

0.2 ± 0.0

0.1 ± 0.0

0.2 ± 0.0

0.3 ± 0.0

0.4658

 Octanoic acid

0.9 ± 0.1b

0.8 ± 0.0bc

0.7 ± 0.1bc

0.8 ± 0.1bc

0.7 ± 0.1c

2.3 ± 1.3a

0.8 ± 0.0bc

0.8 ± 0.2bc

0.8 ± 0.1b

0.0115

Aldehydes

 2-Methylbutanal

0.1 ± 0.0ns

0.0 ± 0.0

0.0 ± 0.0

0.0 ± 0.0

0.0 ± 0.0

0.0 ± 0.0

0.1 ± 0.0

0.0 ± 0.0

0.0 ± 0.0

0.2574

 3-Methylbutanal

6.0 ± 0.2a

5.3 ± 0.2b

3.7 ± 0.1f

5.0 ± 0.1c

4.3 ± 0.1d

3.7 ± 0.0e

3.3 ± 0.0g

2.0 ± 0.1h

1.4 ± 0.3i

 < 00001

 Pentanal

395.0 ± 22.6i

548.9 ± 19.8h

857.1 ± 35.9g

1550.0 ± 38.9f

1974.0 ± 121.4e

2202.0 ± 19.4d

2720.0 ± 95.0c

3056.0 ± 61.6b

3242.0 ± 154.9a

 < 00001

 Octanal

7.0 ± 0.2a

6.9 ± 0.1b

6.5 ± 0.1c

5.7 ± 0.1d

5.3 ± 0.2e

4.8 ± 0.1f

4.2 ± 0.1g

4.0 ± 0.2h

3.8 ± 0.3i

 < 00001

 Nonanal

8.7 ± 0.0a

8.2 ± 0.1b

7.9 ± 0.1c

7.0 ± 0.1d

6.8 ± 0.4e

6.5 ± 0.3f

5.2 ± 0.3g

4.6 ± 0.1h

4.5 ± 0.2i

 < 00001

 (E)-2-Octenal

10.1 ± 0.1a

9.8 ± 0.1b

9.6 ± 0.2c

9.0 ± 0.4d

8.7 ± 0.2e

8.2 ± 0.3f

5.8 ± 0.2g

5.8 ± 0.1h

5.7 ± 0.1i

 < 00001

 Benzaldehyde

2.3 ± 0.1a

2.0 ± 0.0c

1.9 ± 0.0d

2.1 ± 0.6b

1.9 ± 0.1e

1.9 ± 0.1f

2.1 ± 0.1b

1.8 ± 0.0g

1.7 ± 0.1h

0.0002

 Phenylacetaldehyde

26.8 ± 0.6a

24.7 ± 1.4b

20.5 ± 1.7c

17.8 ± 1.6d

16.8 ± 1.7f

15.5 ± 0.1g

16.8 ± 0.6e

13.0 ± 1.0h

12.4 ± 0.5i

 < 00001

  1. Different letters in the same column indicate statistically significant differences (p ≤ 0.01). ns; not significant