What is an insecticide called that is caused by a bacteria infecting a disease?

The term that describes an insecticide derived from bacterial infections is microbial. Microbial insecticides utilize bacteria, fungi, viruses, or other microorganisms to control pest populations. One of the most well-known examples is Bacillus thuringiensis (Bt), a bacterium that produces a toxin harmful to certain insect larvae. These microbial agents offer an environmentally friendly alternative to traditional chemical insecticides, targeting specific pests while minimizing impacts on non-target organisms and humans.

Antibacterial refers to substances that kill or inhibit bacteria, but it is not specific to insect control. Dormant oil is a horticultural oil used primarily for controlling scale insects and pests during their inactive period but does not involve a bacterial mechanism. As such, microbial is the most accurate term for insecticides derived from bacterial infections.