Table 4 Toxicity of insecticides (Pyriproxyfen and Spirotetramat) with and without M. anisopliae for A. gossypii.
Teatments | Ratio | Exposure period (hours) | Regression equation | Chi-square | LC50 ± SE (fiducial limits) (ppm) | SF | CTC | Type of action | LC90 ± SE (fiducial limits) (ppm) | SF | CTC | Type of action |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pyriproxyfen | 24 | y = 13.212x + 7.861 | 0.560 | 5.574 ± 0.618 (1.731–12.55) | – | – | – | 40.350 ± 8.072 (5.030–204.1) | – | – | – | |
48 | y = 17.114x + 18.570 | 0.002 | 3.100 ± 0.300 (1.181–17.270) | – | – | – | 54.332 ± 21.337 (5.390–91.060) | – | – | – | ||
72 | y = 19.667x + 36.673 | 0.060 | 0.62 ± 0.178 (0.36–5.14) | – | – | – | 23.940 ± 5.335 (3.541–27.920) | – | – | – | ||
Pyriproxyfen + M. anisopliae | 1:1 | 24 | y = 13.102x + 10.923 | 0.010 | 4.701 ± 0.807 (1.580–2132) | 1.185 | 118.500 | Synergistic | 40.122 ± 16.435 (5.070–85.02) | 1.005 | 100.501 | Synergistic |
48 | y = 30.296x + 20.930 | 0.010 | 1.040 ± 0.305 (0.690–4.173) | 2.980 | 298.070 | Synergistic | 9.530 ± 9.242 (2.951–1758.5) | 5.700 | 570.090 | Synergistic | ||
72 | y = 22.695x + 49.060 | 0.030 | 0.184 ± 0.087 (0.000–0.321) | 3.444 | 344.401 | Synergistic | 7.83 ± 9.709 (2.06–6581) | 3.057 | 305.700 | Synergistic | ||
Spirotetramat | 24 | y = 40.771x + 6.280 | 0.060 | 1.791 ± 0.912 (0.522–13.02) | – | – | – | 11.153 ± 2.596 (1.380–23.950) | – | – | – | |
48 | y = 59.693x + 16.271 | 0.001 | 1.000 ± 0.963 (0.363–11.070) | – | – | – | 14.670 ± 3.280 (1.532–30.81) | – | – | – | ||
72 | y = 70.884x + 32.142 | 0.040 | 0.260 ± 0.116 (0.141–5.280) | – | – | – | 11.590 ± 2.129 (1.221–107.500) | – | – | – | ||
Spirotetramat + M. anisopliae | 1:1 | 24 | y = 56.608x + 7.660 | 0.007 | 1.622 ± 0.870 (0.451–13.24) | 1.104 | 110.400 | Synergistic | 13.14 ± 7.889 (1.48–25.20) | 0.848 | 84.85 | Antagonistic |
48 | y = 94.698x + 20.743 | 0.171 | 0.360 ± 0.140 (0.220–3.551) | 2.777 | 277.700 | Synergistic | 3.934 ± 4.729 (0.973–8866.600) | 3.732 | 373.280 | Synergistic | ||
72 | y = 77.276x + 45.731 | 0.004 | 0.060 ± 0.027 (0.000–0.110) | 4.333 | 433.300 | Synergistic | 3.790 ± 0.605 (0.721–22.010) | 3.058 | 305.800 | Synergistic |
