Table 2 The median lethal times (LT50) of the boll weevil (Anthonomus grandis grandis) populations exposed to the malathion, profenophos + cypermethrin, and fipronil insecticides. Values of LT50 followed by the same letter do not differ significantly according to the Holm-Sidak test (P < 0.05). The values of χ 2 and P refer to the difference between the populations concerning the same insecticide
Insecticide | Meso-region | County | Boll weevil code | LT50/h | Confidence interval (95%) | χ2 | P |
|---|---|---|---|---|---|---|---|
Malathion | West | Luís Eduardo Magalhães | LEM1 | 64.45b | 61.13–67.78 | 459.99 | < 0.001 |
Luís Eduardo Magalhães | LEM2 | 60.96bc | 57.54–64.38 | ||||
Southwest | Bom Jesus da Lapa | BJL1 | 67.29ab | 62.31–72.28 | |||
Candiba | CAN1 | 44.40d | 42.20–46.60 | ||||
Candiba | CAN2 | 77.01a | 72.63–81.38 | ||||
Guanambi | GBI1 | 62.28b | 59.09–65.47 | ||||
Palmas de Monte Alto | PMA1 | 42.40d | 39.80–45.00 | ||||
Palmas de Monte Alto | PMA2 | 71.03a | 65.99–76.06 | ||||
Pindaí | PIN1 | 24.00e | 24.00–24.00 | ||||
Pindaí | PIN2 | 55.14bc | 51.41–58.87 | ||||
Pindaí | PIN3 | 74.16a | 69.21–79.11 | ||||
Vitória da Conquista | VCA1 | 24.00e | 24.00–24.00 | ||||
Profenofos + cypermethrin | West | Luís Eduardo Magalhães | LEM1 | 77.52a | 73.20–81.83 | 405.18 | < 0.001 |
Luís Eduardo Magalhães | LEM2 | 61.78ab | 58.45–65.11 | ||||
Southwest | Bom Jesus da Lapa | BJL1 | 56.17b | 52.39–59.95 | |||
Candiba | CAN1 | 64.82a | 61.55–68.09 | ||||
Candiba | CAN2 | 41.60c | 38.88–44.32 | ||||
Guanambi | GBI1 | 70.49a | 65.50–75.48 | ||||
Palmas de Monte Alto | PMA1 | 39.20c | 36.25–42.16 | ||||
Palmas de Monte Alto | PMA2 | 70.28a | 65.71–74.86 | ||||
Pindaí | PIN1 | 39.20c | 36.25–42.16 | ||||
Pindaí | PIN2 | 70.50a | 65.73–75.27 | ||||
Pindaí | PIN3 | 57.00b | 53.08–60.92 | ||||
Vitória da Conquista | VCA1 | 24.00d | 24.00–24.00 | ||||
Fipronil | West | Luís Eduardo Magalhães | LEM1 | 61.02a | 57.66–64.38 | 410.54 | < 0.001 |
Luís Eduardo Magalhães | LEM2 | 61.02a | 57.66–64.38 | ||||
Southwest | Bom Jesus da Lapa | BJL1 | 41.60bc | 38.89–44.32 | |||
Candiba | CAN1 | 38.00bc | 34.98–41.02 | ||||
Candiba | CAN2 | 24.00d | 24.00–24.00 | ||||
Guanambi | GBI1 | 24.00d | 24.00–24.00 | ||||
Palmas de Monte Alto | PMA1 | 38.00bc | 34.98–41.02 | ||||
Palmas de Monte Alto | PMA2 | 40.40bc | 37.55–43.26 | ||||
Pindaí | PIN1 | 24.00c | 24.00–24.00 | ||||
Pindaí | PIN2 | 37.20c | 34.15–40.25 | ||||
Pindaí | PIN3 | 24.00d | 24.00–24.00 | ||||
Vitória da Conquista | VCA1 | 24.00d | 24.00–24.00 |