Table 4 Susceptibility and resistance level of Spodoptera frugiperda samples to six insecticides recommended for FAW control in Thailand
Insecticides | Recommended dose (mg/L) | Sample | N | Slope ± SE | LC50 (95% CL*) (mg/L) | LC95 (95% CL*) (mg/L) | RC** | Resistance level |
|---|---|---|---|---|---|---|---|---|
Emamectin benzoate 1.92% EC | 19.20 | TM2019 | 320 | 5.925 ± 0.785 | 0.014 (0.013 – 0.016) | 0.027 (0.022–0.036) | 0.001 | None |
SN2019 | 320 | 4.929 ± 0.610 | 0.015 (0.013–0.018) | 0.032 (0.023–0.063) | 0.002 | None | ||
SP2021 | 320 | 5.393 ± 0.592 | 0.017 (0.014–0.025) | 0.035 (0.025–0.092) | 0.002 | None | ||
TL2021 | 320 | 3.249 ± 0.305 | 0.029 (0.023–0.039) | 0.093 (0.062–0.192) | 0.005 | None | ||
WS2022 | 320 | 3.806 ± 0.360 | 0.027 (0.021–0.036) | 0.073 (0.050–0.142) | 0.004 | None | ||
Spinetoram 12%SC | 120.00 | TM2019 | 320 | 1.846 ± 0.391 | 0.005 (0.002–0.008) | 0.040 (0.028–0.084) | 0.000 | None |
SN2019 | 320 | 1.947 ± 0.306 | 0.009 (0.001–0.015) | 0.060 (0.031–1.260) | 0.001 | None | ||
SP2021 | 320 | 1.231 ± 0.149 | 0.012 (0.006–0.020) | 0.270 (0.118–1.733) | 0.002 | None | ||
Chlorantraniliprole 5.17% SC | 77.55 | TM2019 | 320 | 2.898 ± 0.304 | 0.433 (0.364–0.517) | 1.601 (1.211–2.384) | 0.021 | None |
SN2019 | 320 | 2.610 ± 0.265 | 0.393 (0.328–0.475) | 1.680 (1.240–2.578) | 0.022 | None | ||
SP2021 | 320 | 1.654 ± 0.170 | 0.747 (0.402–1.525) | 7.379 (2.909–82.452) | 0.095 | None | ||
TL2021 | 320 | 1.962 ± 0.193 | 0.442 (0.306–0.629) | 3.046 (1.790–7.630) | 0.039 | None | ||
KC2022 | 320 | 1.968 ± 0.208 | 0.270 (0.212–0.337) | 1.852 (1.307–3.042) | 0.024 | None | ||
WS2022 | 320 | 1.698 ± 0.172 | 0.730 (0.376–1.569) | 6.793 (2.630–93.977) | 0.088 | None | ||
Indoxacarb 15% EC | 225.00 | TM2019 | 320 | 1.906 ± 0.289 | 1.526 (0.982–2.048) | 11.129 (7.724–20.339) | 0.049 | None |
SN2019 | 320 | 2.487 ± 0.354 | 1.877 (1.402–2.337) | 8.610 (6.347–14.054) | 0.038 | None | ||
TL2021 | 320 | 1.448 ± 0.176 | 5.259 (3.554–9.019) | 71.888 (30.257–372.490) | 0.320 | None | ||
KC2022 | 320 | 1.791 ± 0.227 | 7.530 (5.772–10.645) | 62.422 (34.671–161.009) | 0.277 | None | ||
WS2022 | 320 | 1.938 ± 0.280 | 10.466 (7.909–15.650) | 73.854 (39.439–219.453) | 0.328 | None | ||
Chlorfenapyr 10% SC | 150.00 | TM2019 | 320 | 1.963 ± 0.194 | 2.086 (1.268–3.450) | 14.369 (7.210–63.649) | 0.096 | None |
SN2019 | 320 | 1.786 ± 0.181 | 2.049 (1.243–3.360) | 17.086 (8.343–77.231) | 0.114 | None | ||
TL2021 | 320 | 4.492 ± 0.559 | 7.056 (6.120–8.122) | 16.397 (13.357–22.358) | 0.109 | None | ||
KC2022 | 320 | 4.476 ± 0.558 | 7.733 (6.714–8.915) | 18.022 (14.621–24.761) | 0.120 | None | ||
WS2022 | 320 | 4.174 ± 0.510 | 8.874 (7.669–10.284) | 21.987 (17.643–30.649) | 0.147 | None | ||
Lufenuron 5% EC | 75.00 | TM2019 | 320 | 1.270 ± 0.151 | 2.359 (1.521–3.551) | 46.591 (21.594–189.192) | 0.621 | None |
SN2019 | 320 | 1.271 ± 0.151 | 2.267 (1.373–3.573) | 44.631 (19.536–224.426) | 0.595 | None | ||
SP2021 | 320 | 1.297 ± 0.154 | 4.558 (3.405–6.311) | 84.518 (43.602–236.717) | 1.127 | Low | ||
TL2021 | 320 | 0.928 ± 0.125 | 1.034 (0.597–1.553) | 61.180 (29.292–203.736) | 0.816 | None | ||
KC2022 | 320 | 1.097 ± 0.191 | 0.259 (0.095–0.451) | 8.180 (4.638–22.907) | 0.109 | None | ||
WS2022 | 320 | 0.910 ± 0.172 | 0.209 (0.055–0.415) | 13.403 (6.691–52.303) | 0.179 | None |