Table 4.
Repellency activity of asaricin 1, isoasarone 2, and trans-asarone 3 against S. oryzae, R. dominica and and P.interpunctella.
| Compounds | Insects | Repellency (mean ± SE)* | Mean repellency (%) | |||
|---|---|---|---|---|---|---|
| 5 h | 10 h | 15 h | 20 h | |||
| Asaricin 1 | S. oryzae | 51.2 ± 10.3 a | 67.2 ± 8.5 a | 74.2 ± 5.3 ab | 82.5 ± 6.4 a | 68.6 ± 6.6 a |
| R. dominica | 60.0 ± 7.1 a | 74.5 ± 6.4 a | 81.2 ± 6.3 a | 85.0 ± 7.8 a | 75.1 ± 5.5 a | |
| P. interpunctella | 33.7 ± 4.7 b | 38.7 ± 7.5 b | 45.4 ± 7.2 c | 50.0 ± 7.1 b | 42.7 ± 3.9 b | |
| Isoasarone 2 | S. oryzae | 51.2 ± 7.5 a | 60.0 ± 7.8 a | 69.5 ± 6.2 b | 79.2 ± 8.3 a | 68.1 ± 6.2 a |
| R. dominica | 58.7 ± 13.1 a | 65.0 ± 7.9 a | 72.5 ± 5.5 ab | 79.2 ± 5.1 a | 68.8 ± 4.4 a | |
| P. interpunctella | 31.2 ± 2.5 b | 37.5 ± 6.5 b | 41.2 ± 2.5 c | 58.7 ± 4.8 b | 42.1 ± 5.8 b | |
| Trans-asarone 3 | S. oryzae | NA | NA | NA | NA | NA |
| R. dominica | NA | NA | NA | NA | NA | |
| P. interpunctella | NA | NA | NA | NA | NA | |
*Each data represents the mean of four replicates. Values followed by the same letter are not significantly different according to the Tukey test (p < 0.05).
h: hours after treatment.
NA: below 10% of repellency.