Table 1.

Comparison of the growth efficiency of B. thuringiensis strains in four media

StrainNo. of CFU/mla in:
GYSbPeptonized milkG-TrisNutrient broth
4Q75.3 × 107 a8.0 × 1083.4 × 1087.0 × 106
4Q7/pHT31014.3 × 107 b5.9 × 1083.1 × 1082.2 × 106
DSM 28039.7 × 107 c5.2 × 1085.8 × 1079.7 × 105
NB1763.8 × 107 d2.2 × 1083.6 × 1074.1 × 106
4Q7/pPFT3A3.5 × 107 e1.4 × 1081.9 × 1074.1 × 105
4Q7/pPFT3As2.8 × 107 d1.2 × 1081.1 × 1073.4 × 105
  • a Standard deviations (±) were as follows: GYS (4Q7, 2.5 × 106; 4Q7/pHT3101, 2 × 106; DSM 2803, 1.1 × 106; NB176, 2.9 × 106; 4Q7/pPFT3A, 4.6 × 106; 4Q7/pPFT3As, 2.0 × 106), peptonized milk (4Q7, 2.5 × 108; 4Q7/pHT3101, 1.8 × 107; DSM 2803, 1.9 × 107; NB176, 1.7 × 107; 4Q7/pPFT3A, 8.9 × 105; 4Q7/pPFT3As, 1.1 × 106), G-Tris (4Q7, 4.4 × 106; 4Q7/pHT3101, 1.9 × 106; DSM 2803, 4.5 × 106; NB176, 9.2 × 105; 4Q7/pPFT3A, 8.9 × 105; 4Q7/pPFT3As, 1.1 × 106), and nutrient broth (4Q7, 3 × 105; 4Q7/pHT3101, 1.3 × 105; DSM 2803, 1.4 × 104; NB176, 2.9 × 105; 4Q7/pPFT3A, 4.3 × 104; 4Q7/pPFT3As, 4.3 × 104).

  • b Values followed by different letters were significantly different at P = 0.05.