Table 3.
Toxicity of some newer insecticides against different populations of Spodoptera litura from Hunan, China
| Insecticides | Location | Collected from | Collection data | Dose range (mg/l) | LC50 (mg/l) (95 % FL) | RR | Fit of probit line | n | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Slope (±SE) | χ 2 | df | ||||||||
| Emamectin benzoate | Changsha | Taro | Sep-10 | 0.25–4 | 0.97 (0.15–1.79) | 1.45 | 1.60 ± 0.19 | 0.61 | 4 | 240 |
| Cotton | Sep-11 | 0.5–8 | 2.40 (1.87–2.93) | 3.58 | 2.07 ± 0.23 | 1.59 | 4 | 240 | ||
| Cotton | Oct-12 | 1.25–20 | 6.95 (4.83–9.07) | 10.4 | 1.91 ± 0.22 | 2.60 | 4 | 240 | ||
| Yueyang | Lotus | Sep-10 | 0.25–4 | 1.51 (1.13–1.89) | 2.25 | 2.18 ± 0.40 | 0.33 | 4 | 240 | |
| Cotton | Aug-11 | 0.5–8 | 3.33 (2.75–3.91) | 4.97 | 1.89 ± 0.36 | 0.85 | 4 | 240 | ||
| Lotus | July-12 | 0.5–8 | 3.24 (2.58–3.89) | 4.83 | 1.58 ± 0.18 | 2.23 | 4 | 240 | ||
| Changde | Soybean | Aug-10 | 0.25–4 | 1.86 (1.55–2.18) | 2.78 | 1.67 ± 0.19 | 1.38 | 4 | 240 | |
| Cotton | Aug-11 | 1–16 | 5.24 (4.05–6.43) | 7.82 | 1.55 ± 0.15 | 1.33 | 4 | 240 | ||
| Cotton | Oct-12 | 1–16 | 4.90 (3.67–6.22) | 7.31 | 1.63 ± 0.28 | 0.76 | 4 | 240 | ||
| Yiyang | Soybean | Oct-10 | 0.5–8 | 3.44 (3.12–3.75) | 5.13 | 2.02 ± 0.20 | 3.13 | 4 | 240 | |
| Cotton | July-11 | 2.5–40 | 11.58 (7.38–15.79) | 17.3 | 1.84 ± 0.29 | 0.72 | 4 | 240 | ||
| Cotton | Aug-12 | 1.25–20 | 6.29 (5.40–7.19) | 22.5 | 1.35 ± 0.33 | 0.35 | 4 | 240 | ||
| Chenzhou | Cotton | Oct-11 | 1.25–20 | 5.82 (4.02–7.61) | 8.68 | 1.69 ± 0.23 | 0.80 | 4 | 240 | |
| Sweet potato | Sep-12 | 2–32 | 8.15 (3.93–12.36) | 12.2 | 1.37 ± 0.35 | 0.54 | 4 | 240 | ||
| Abamectin | Changsha | Taro | Sep-10 | 0.15–2.4 | 0.74 (0.53–0.95) | 2.64 | 1.94 ± 0.24 | 2.01 | 4 | 240 |
| Cotton | Sep-11 | 0.5–8 | 2.42 (1.75–3.14) | 8.64 | 1.80 ± 0.35 | 0.17 | 4 | 240 | ||
| Cotton | Oct-12 | 1.25–20 | 5.83 (4.35–7.31) | 20.8 | 1.73 ± 0.16 | 0.79 | 4 | 240 | ||
| Yueyang | Lotus | Sep-10 | 1.875–30 | 10.55 (7.92–13.17) | 15.7 | 1.83 ± 0.25 | 1.88 | 4 | 240 | |
| Cotton | Aug-11 | 1.25–20 | 4.41 (3.29–5.52) | 19.4 | 1.53 ± 0.34 | 0.54 | 4 | 240 | ||
| Lotus | July-12 | 1.875–30 | 9.69 (8.32–11.06) | 34.6 | 2.21 ± 0.24 | 0.38 | 4 | 240 | ||
| Changde | Soybean | Aug-10 | 0.625–10 | 2.93 (2.16–3.71) | 10.5 | 2.06 ± 0.37 | 2.22 | 4 | 240 | |
| Cotton | Aug-11 | 0.75–12 | 4.34 (3.13–5.56) | 15.5 | 1.94 ± 0.28 | 1.16 | 4 | 240 | ||
| Cotton | Oct-12 | 0.75–12 | 3.86 (3.09–4.61) | 13.8 | 1.75 ± 0.35 | 0.49 | 4 | 240 | ||
| Yiyang | Soybean | Oct-10 | 0.25–4 | 1.72 (1.16–2.27) | 6.13 | 2.20 ± 0.22 | 0.72 | 4 | 240 | |
| Cotton | July-11 | 1–16 | 5.00 (3.75–6.24) | 17.8 | 2.00 ± 0.26 | 1.30 | 4 | 240 | ||
| Cotton | Aug-12 | 1.25–20 | 6.29 (5.40–7.19) | 22.5 | 1.35 ± 0.33 | 0.35 | 4 | 240 | ||
| Chenzhou | Cotton | Oct-11 | 1–16 | 5.07 (3.37–6.76) | 18.1 | 1.69 ± 0.33 | 0.28 | 4 | 240 | |
| Sweet potato | Sep-12 | 2.5–40 | 11.93 (7.27–16.59) | 42.6 | 1.60 ± 0.41 | 0.59 | 4 | 240 | ||
| Indoxacarb | Changsha | Taro | Sep-10 | 0.075–1.2 | 0.33 (0.26–0.41) | 4.18 | 1.72 ± 0.27 | 2.60 | 4 | 240 |
| Cotton | Sep-11 | 0.2–3.2 | 0.80 (0.62–0.98) | 10.0 | 1.47 ± 0.55 | 0.99 | 4 | 240 | ||
| Cotton | Oct-12 | 0.25–4 | 1.01 (0.72–1.30) | 12.6 | 1.35 ± 0.33 | 0.35 | 4 | 240 | ||
| Yueyang | Lotus | Sep-10 | 0.05–0.8 | 0.23 (0.18–0.29) | 2.92 | 1.75 ± 0.37 | 0.88 | 4 | 240 | |
| Cotton | Aug-11 | 0.25–4 | 1.37 (1.15–1.60) | 17.2 | 1.86 ± 0.35 | 1.66 | 4 | 240 | ||
| Lotus | July-12 | 0.5–8 | 1.77 (1.11–2.47) | 22.1 | 1.51 ± 0.29 | 0.52 | 4 | 240 | ||
| Changde | Soybean | Aug-10 | 0.25–4 | 1.10 (0.88–1.31) | 13.7 | 1.81 ± 0.29 | 0.18 | 4 | 240 | |
| Cotton | Aug-11 | 0.5–8 | 1.79 (1.37–2.21) | 22.4 | 2.24 ± 0.21 | 1.16 | 4 | 240 | ||
| Cotton | Oct-12 | 0.5–8 | 1.64 (0.98–2.38) | 20.5 | 1.73 ± 0.35 | 0.41 | 4 | 240 | ||
| Yiyang | Soybean | Oct-10 | 0.025–0.4 | 0.15 (0.12–0.19) | 1.92 | 1.95 ± 0.38 | 0.72 | 4 | 240 | |
| Cotton | July-11 | 0.25–4 | 1.29 (0.83–1.74) | 16.1 | 1.67 ± 0.27 | 1.58 | 4 | 240 | ||
| Cotton | Aug-12 | 0.25–4 | 1.15 (0.51–1.79) | 14.4 | 1.58 ± 0.34 | 0.44 | 4 | 240 | ||
| Chenzhou | Cotton | Oct-11 | 0.05–0.8 | 0.29 (0.22–0.36) | 3.65 | 1.48 ± 0.24 | 1.38 | 4 | 240 | |
| Sweet potato | Sep-12 | 0.125–2 | 0.62 (0.311–0.921) | 7.70 | 1.61 ± 0.37 | 0.62 | 4 | 240 | ||
| Chlorfenapyr | Changsha | Taro | Sep-10 | 0.5–8 | 2.51 (1.97–3.04) | 4.64 | 1.73 ± 0.16 | 2.01 | 4 | 240 |
| Cotton | Sep-11 | 0.5–8 | 2.10 (1.46–2.73) | 3.88 | 1.57 ± 0.32 | 0.38 | 4 | 240 | ||
| Cotton | Oct-12 | 1.25–20 | 5.63 (3.05–10.40) | 10.4 | 1.70 ± 0.35 | 0.11 | 4 | 240 | ||
| Yueyang | Lotus | Sep-10 | 0.625–10 | 2.58 (1.97–3.18) | 4.77 | 1.94 ± 0.24 | 0.32 | 4 | 240 | |
| Cotton | Aug-11 | 0.75–12 | 4.13 (3.16–5.09) | 7.64 | 2.10 ± 0.33 | 0.45 | 4 | 240 | ||
| Lotus | July-12 | 0.75–12 | 3.52 (2.73–4.31) | 6.52 | 1.81 ± 0.32 | 0.07 | 4 | 240 | ||
| Changde | Soybean | Aug-10 | 1.5–24 | 8.14 (6.32–9.97) | 15.1 | 1.71 ± 0.24 | 1.71 | 4 | 240 | |
| Cotton | Aug-11 | 1.5–24 | 9.72 (8.43–11.01) | 18.0 | 1.36 ± 0.23 | 0.28 | 4 | 240 | ||
| Cotton | Oct-12 | 1.5–24 | 7.62 (3.77–15.41) | 14.1 | 1.62 ± 0.36 | 0.40 | 4 | 240 | ||
| Yiyang | Soybean | Oct-10 | 1–16 | 4.43 (3.78–5.08) | 8.20 | 1.83 ± 0.25 | 2.04 | 4 | 240 | |
| Cotton | July-11 | 1.25–20 | 5.05 (3.92–6.18) | 9.35 | 1.61 ± 0.56 | 0.26 | 4 | 240 | ||
| Cotton | Aug-12 | 2–32 | 8.86 (3.88–20.23) | 16.4 | 2.17 ± 0.35 | 0.48 | 4 | 240 | ||
| Chenzhou | Cotton | Oct-11 | 1–16 | 4.41 (3.35–5.46) | 8.16 | 1.78 ± 0.18 | 0.79 | 4 | 240 | |
| Sweet potato | Sep-12 | 0.7–12 | 3.06 (1.63–4.48) | 5.66 | 1.57 ± 0.31 | 1.01 | 4 | 240 | ||
RR resistance ratio, calculated as LC50 of field/LC50 of Lab-BJ, n number of larvae used in bioassay, including controls, χ 2 values was not significant for all the assays