TABLE 1.

Reported LC₅₀ and FL₉₅ values of different toxins for four unselected laboratory strains of P. xylostella

Protein	Result for the following strain:
	LAB-V91a		Genevab		LAB-PSc		Reunion Islandd
	LC50	FL95	LC50	FL95	LC50	FL95	LC50	FL95
Cry1Aa	239	127–1,045	0.3	0.2–0.3	2.80	1.94–4.26	22.10	16.20–30.16
Cry1Ab	15	5–30	0.6	0.4–1.2	1.60	1.35–1.90	0.57	0.47–0.69
Cry1Ac	44	29–99	1.1	0.5–2.5	0.74	0.50–1.16	20.09	14.67–27.52
Cry1Ca	117	68–210	4.3	3.3–5.7	10.55	8.08–14.20	7.58	5.65–10.18
Cry1Da	>1,350	NA	0.2	0.1–0.2	19.10e	13.20–25.00	18.82	14.47–24.48

^aBioassays were performed with the diet overlay method. The larvae were intoxicated for 5 days, and mortality was scored at 5 days. Cry proteins were used in their activated form. Values are given in nanograms per square centimeter and are from references 1 (for Cry1Aa, Cry1Ab, and Cry1Ac), 5 (for Cry1Da), and 7 (for Cry1Ca), which contain the most recent data published for this strain. NA, not available. 

^bBioassays were performed with the leaf dip method (22). The larvae were intoxicated for 3 days, and mortality was scored at 3 days. Cry1Aa, Cry1Ab, Cry1Ac, and Cry1Ca were used as solubilized protoxins, and Cry1Da was used as an activated toxin. Values are given in milligrams per liter. 

^cBioassays were performed with the leaf dip method (16). The larvae were intoxicated for 2 days, and mortality was scored at 5 days. Cry proteins were used as a mixture of spores and crystals. Values are given in milligrams per liter. 

^dBioassays were performed with the leaf dip method (17). The larvae were intoxicated for 2 days, and mortality was scored at 2 days. Cry proteins were used in their activated form. Values are given in milligrams per liter. 

^eBioassay data are from this study (slope of the regression line obtained by probit analysis, and standard error, 2.10 ± 0.37).