TABLE 3.
Mean LC50 estimated for each selected B. thuringiensis strain tested against three populations of S. frugiperdalarvae, and cry gene profiles of selected strains
| B. thuringiensis strain | Mean LC50 (ng/cm2)a of the indicated strain against S. frugiperda populations from:
|
cry gene profile | ||
|---|---|---|---|---|
| Mexico | Brazil | Colombia | ||
| LBIT27 | 288.8 (173.8-479.9) | 300.5 (222.9-405.1) | ND | cry1Ab, cry1Ac, cry1B, cry1E, cry1G, cry1I, cry2 |
| LBIT193 | 329.4 (233.7-464.1) | >2,000 | ND | cry1Ab, cry1Ac, cry1E, cry1G, cry1I |
| IBUN28 | 612.1 (394.2-950.4) | 743.9 (439.3-1,259.6) | 936.1 (460.1-2,832.3) | cry1Aa, cry1Ab, cry1C, cry1D, cry1I |
| S811 | 164.1 (98.4-273.5) | 157.6 (81.1-290.2) | 13.3 (2.4-29.4) | cry1Aa, cry1Ab, cry1B, cry1D, cry1I |
| 147-5501 | 437.7 (280.8-680.5) | 141.8 (84.3-238.4) | 14.2 (2.4-36.3) | cry1Aa, cry1B, cry1D, cry1I, cry2 |
| CIBCM-166 | 95.7 (43.3-208.3) | 294.6 (199.2-435.5) | 12.9 (1.5-32.2) | cry1Aa, cry1Ab, cry1Ac, cry1Ad, cry1B, cry1D, cry1I, cry2 |
| IB217 | 711.1 (480.3-1,052.9) | 928.7 (439.4-1,962.8) | 1,923.9 (1,072.6-6,058.4) | cry1Aa, cry1Ac, cry1Ad, cry1C, cry1D, cry1I |
| IB412 | 200.9 (88.7-455.3) | 863.93 (465.2-1,912) | 358.2 (233.7-597.6) | cry1Ab, cry1Ac, cry1B, cry1E, cry1G, cry1I, cry2 |
| HD137 | 41.8 (12.1-65.7) | 189.6 (136.9-262.5) | 22.9 (10.5-30.9) | cry1Aa, cry1B, cry1C, cry1D |
a
Values in parentheses are fiducial limits (P = 0.95). ND, not determined.