Table 1.

End‐point mortality (%) (mean, range, ± 1 SE) and the mean number of Tribolium castaneum adults that survived (±1 SE) (in each of two generations of the populations concerned) following a 48‐hr selection event (phosphine fumigation) at a target rate of 0.135 mg/L of phosphine gas. The numbers of beetles that were fumigated are also given

Migration rate	Generation 3			Generation 6
	Mean number of beetles fumigated	Mortality (%)	Beetles surviving	Mean number of beetles fumigated	Mortality (%)	Beetles surviving
Low	4,687.3 ± 253.8	99.3 (98.9–99.8) ± 0.1	32.4 ± 5.9	5,079.1 ± 246.8	97.7 (96.2–98.9) ± 0.3	115.8 ± 19.4
High	6,457.3 ± 304.5	85.9 (82.0–96.2) ± 1.3	955.9 ± 109.2	6,595.9 ± 231.6	66.2 (50.1–74.6) ± 2.5	2,194.0 ± 113.1