Table 8. Time to onset of poisoning symptoms in the abdominal nerve cord of susceptible (CSMA) and resistant (LPP) German cockroaches^a).

Strain of G. cockroach	Minute to onset of poisoning symptomsb)
CSMA	26.5±3.7
LPP	74.0±6.7

^a) Dihydropicrotoxinin (10⁻⁵ M) with piperonyl butoxide (10⁻⁴ M). ^b) Data are expressed as means±S.E. of five experiments.