The insects treated with 0.01% Tween-20 were included as controls. The mortality was recorded every 12 h and differences in survival estimated using the Kaplan–Meier method checked with a log-rank test with the SPSS program.
The insects treated with 0.01% Tween-20 were included as controls. The mortality was recorded every 12 h and differences in survival estimated using the Kaplan–Meier method checked with a log-rank test with the SPSS program.