Table 2.
Means (±SE) of fecundity, egg hatching, and longevity of flies surviving exposure to sub-lethal concentrations of spinosad.
Spinosad Concentration (ppm) a | Fecundity (No. Eggs/Female) | Egg Hatch b % | Longevity (Days) c | |
---|---|---|---|---|
Male | Female | |||
Control | 293.8 ± 17.1 a,d | 93.7 ± 1.1 a | 24.0 ± 1.0 a | 28.6 ± 0.8 a |
0.1 | 209.8 ± 11.8 b | 88.3 ± 0.9 b | 20.8 ± 0.9 b | 23.0 ± 0.8 b |
0.4 | 139.8 ± 9.3 c | 82.5 ± 1.4 c | 16.6 ± 0.5 c | 19.0 ± 0.7 c |
a Spinosad was administered to flies only during the first 5 days of the experiment. From the sixth day on, flies were fed with just 30% sucrose solution, the same as the control. b Egg hatching was evaluated after 10, 15, and 20 days from adult emergence. Mean values are presented. c Days from adult emergence to adult death. d Means in each column followed by different letters are significantly different (ANOVA, Tukey test, p < 0.05).