Table 2.

Mortality parameters in S. frugiperda from Mississippi (Benzon) and Puerto Rico (456LSD4) exposed to deltamethrin alone or in the presence of piperonyl butoxide (PBO).

Strain	Origin	Treatment	LC50	95% CI	Slope (SE)
Benzon	Mississippi	deltamethrin	0.24	0.19–0.31	2.02 (0.17)
456LSD4	Puerto Rico	deltamethrin	1.57	0.94–3.08	1.12 (0.08)
		deltamethrin+ PBO	0.29	0.22–0.38	2.39 (0.25)

Units are picograms of active ingredient per centimeter square of diet surface. CI = Confidence intervals (95%), SE = standard error.