. 2001 Mar;67(3):1085–1089. doi: 10.1128/AEM.67.3.1085-1089.2001

TABLE 1.

Toxicity of Cry1Ab protoxin (inclusion bodies) or chymotrypsin-activated Cry1Ab (soluble toxin) with B. thuringiensis-susceptible (688^s) and B. thuringiensis-resistant (198^r and Dpl^r) colonies of P. interpunctella^a

Cry1Ab	LD₅₀ (CI) and RR values^b for colony:
	688^s (LD₅₀)	Dpl^r		198^r
	688^s (LD₅₀)	LD₅₀	RR	LD₅₀	RR
Protoxin	0.208 (0.072–0.458)	218 (none)	1,049	54.81 (34.19–71.04)	264
Toxin	0.005 (0.002–0.012)	1.45 (none)	290	0.123 (0.062–0.227)	25

Tests were performed using a diet cube assay.

LD₅₀ values are expressed as micrograms per larvae, with the 95% confidence interval (CI) given in parentheses. The RR value is the LD₅₀ of the resistant colony/LD₅₀ of the 688^s colony.