Insecticidal Activity of Bacillus thuringiensis Strains Isolated from Soil and Water

Table 2

The 50% lethal concentration (LC₅₀) of crystals of B. thuringiensis MPU B63 and Foray for C. pomonella caterpillars.

Preparation	LC50 value on insect caterpillars [crystals per larva]	Confidence interval 95%
Crystal mixture of MPU B63	1.55 × 10^5	5.89 × 10^4–4.11 × 10^5
Spore-crystal mixture of Foray	3.69 × 10^6	5.7 × 10^5–2.39 × 10^7