Table 1.

Toxicity parameters of Cry1Ab and Cry1Ia protoxins.

Insect Species	Bt Toxins	LC50	Fiducial Limits (95%)		Regression Line
			Lower	Upper	Slope ± SE	a ± SE
L. botrana	Cry1Ab	153	106	217	1.15 ± 0.13	2.48 ± 0.3
	Cry1Ia	80	56	108	1.28 ± 0.13	2.56 ± 0.31
O. nubilalis	Cry1Ab	69	47	97	1.06 ± 0.11	3.04 ± 0.23
	Cry1Ia	273	88	1011	1.50 ± 0.15	1.34 ± 0.14
L. decemlineata	Cry1Ab	NT	-	-	-	-
	Cry1Ia	22	12	53	0.51 ± 0.07	4.29 ± 0.09

LC₅₀ values are expressed as ng/cm² for L. botrana and O. nubilalis, and in μg/mL for L. decemlineata. NT: non-toxic at 100 µg/mL.