Which naturally occurring soil bacterium is mentioned as an effective biological control against young, actively feeding larvae?

Answer

*Bacillus thuringiensis* (*Bt*)

Products containing *Bacillus thuringiensis* (*Bt*) are effective biological controls for the box tree moth. This bacterium must be ingested by the young larvae while they are actively feeding on foliage in order to work.

Which naturally occurring soil bacterium is mentioned as an effective biological control against young, actively feeding larvae?
insectTreedamagepestbox tree moth