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. 2017 Oct 12;12(10):e0186020. doi: 10.1371/journal.pone.0186020

Table 3. Mortality of S. oryzae adults exposed to selected four phytocompounds at different concentrations and times under with and without-food conditions.

Condition Compounds Concentration (μl/L air)
20 100 200 400
Without-food 24 h treatment
Eucalyptol 0.00 ± 0.00a 9.09 ± 6.38a 87.88 ± 5.88c 95.96 ± 4.03d
N. Menthol* 0.00 ± 0.00a 5.05 ± 2.47a 9.09 ± 4.51a 11.11 ± 5.88ab
Menthone 0.00 ± 0.00a 1.01 ± 2.02a 3.03 ± 4.03a 7.07 ± 3.77a
M. Acetate# 15.15 ± 6.04b 21.21 ± 8.67a 39.39 ± 5.52b 47.47 ± 4.94c
Phosphine 0.00 ± 0.00a 6.00 ± 2.45a 12.00 ± 3.74a 32.00 ± 3.16bc
48 h treatment
Eucalyptol 0.00 ± 0.00a 53.54 ± 5.14d 100.0 ± 0.00c 100.0 ± 0.00c
N. Menthol* 7.07 ± 5.88ab 13.13 ± 2.47a 23.23 ± 5.14a 27.27 ± 3.77a
Menthone 0.00 ± 0.00a 37.37 ± 5.88bc 71.72 ± 7.41b 95.96 ± 2.47c
M. Acetate# 19.19 ± 4.51b 23.23 ± 4.03ab 59.60 ± 3.19b 61.62 ± 11.67b
Phosphine 8.00 ± 5.82ab 32.00 ± 3.74ab 52.00 ± 5.82b 66.00 ± 3.99b
72 h treatment
Eucalyptol 10.20 ± 9.88a 69.39 ± 3.22b 100.0 ± 0.00c 100.0 ± 0.00b
N. Menthol* 14.29 ± 8.28a 32.65 ± 6.91a 42.86 ± 2.49a 51.02 ± 4.99a
Menthone 28.57 ± 7.20a 65.31 ± 5.19b 100.0 ± 0.00c 100.0 ± 0.00b
M. Acetate# 36.73 ± 7.48a 51.02 ± 5.94ab 69.39 ± 4.56b 87.76 ± 4.99b
Phosphine 13.13 ± 2.47a 65.66 ± 5.14b 73.74 ± 2.47b 85.86 ± 4.03b
With-food 24 h treatment
Eucalyptol 0.00 ± 0.00a 0.00 ± 0.00a 9.09 ± 5.52a 89.89 ± 7.81c
N. Menthol* 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a
Menthone 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a
M. Acetate# 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a
Phosphine 2.00 ± 2.00a 8.00 ± 3.74a 34.00 ± 5.09a 42.00 ± 5.82b
48 h treatment
Eucalyptol 0.00 ± 0.00a 5.05 ± 4.03a 31.31 ± 5.88c 97.98 ± 2.02d
N. Menthol* 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a
Menthone 0.00 ± 0.00a 11.11 ± 3.77a 55.56 ± 2.47d 73.74 ± 4.03c
M. Acetate# 3.30 ± 2.49a 7.07 ± 2.02a 15.15 ± 4.03b 21.21 ± 3.77b
Phosphine 6.00 ± 2.45a 40.00 ± 4.46b 48.00 ± 3.74d 62.00 ± 5.82c
72 h treatment
Eucalyptol 6.12 ± 3.81a 24.49 ± 9.45b 87.75±4.99cd 100.0 ± 0.00c
N. Menthol* 0.00 ± 0.00a 0.00 ± 0.00 a 0.00 ± 0.00a 0.00 ± 0.00a
Menthone 14.29 ± 5.19a 42.86 ± 6.91bc 100.0 ± 0.00d 100.0 ± 0.00c
M. Acetate# 8.16 ± 3.22a 28.57 ± 1.77b 38.78 ± 4.56b 42.86 ± 8.28b
Phosphine 16.00 ± 5.09a 68.00 ± 6.62c 80.00 ± 4.46c 88.00 ± 2.00c

*Neoisocarvomenthol;

#Menthyl acetate;

Each value is a mean of five replicates with standard error (Mean ± SE). Means within a column and within exposure period (h) followed by the different letters are significantly different (P≤0.05) of mortality of S. oryzae adults as determined by Tukey’s test.