Table 2. Summary of effective concentration (EC, or growth inhibition concentration) of H. armigera neonates exposed to Cry1Ac protein incorporated into artificial diet.

Seasona	Population	Generation	nb	EC50 (μg mL−1 diet)c		EC90 (μg mL−1 diet)c
				Concentration	95% CI	Concentration	95% CI
2013/14	LAB	F4	523	0.0028	0.0018–0.0049	0.0189	0.0062–0.0249
	MS-1	F3	447	0.0029	0.0021–0.0037	0.0421	0.0344–0.0526
	SP-1	F2	466	0.0034	0.0031–0.0038	0.0407	0.0374–0.0444
	BA-1	F2	468	0.0072	0.0038–0.0082	0.0468	0.0422–0.2120
	PR-1	F2	451	0.0055	0.0049–0.0060	0.0341	0.0301–0.0389
	MT-1	F2	593	0.0079	0.0038–0.0128	0.1848	0.0894–0.4885
	GO-1	F2	507	0.0036	0.0020–0.0052	0.0547	0.0371–0.0871
	PR-2	F2	563	0.0033	0.0024–0.0042	0.0658	0.0261–0.0842
	BA-2	F2	478	0.0032	0.0018–0.0050	0.0602	0.0274–0.0644
	BA-3	F3	436	0.0050	0.0041–0.0059	0.0554	0.0452–0.0695
2014/15	MT-2	F2	307	0.0032	0.0002–0.0040	0.0581	0.0470–0.0738
	SP-2	F2	353	0.0030	0.0026–0.0038	0.0590	0.0500–0.0708
	MT-3	F2	316	0.0032	0.0002–0.0038	0.0590	0.0501–0.0708
	BA-4	F2	454	0.0165	0.0128–0.0209	0.2724	0.1676–0.4939
	PR-3	F2	418	0.0160	0.0153–0.0168	0.1143	0.1030–0.1275

^a Season when populations were collected.

^b Number of individuals tested.

^c EC₅₀ and EC₉₀ are the effective concentrations of protein required to cause 50% and 90% growth inhibition, respectively, at 7 days. CI, confidence interval.