Which type of pesticide consists of spores or microbes that target and attack insects?

The correct answer, which identifies the type of pesticide that consists of spores or microbes specifically targeting insects, is microbial insecticides. These insecticides utilize naturally occurring microorganisms, such as bacteria, fungi, or viruses, to control insect populations. When these microbes infect their hosts, they disrupt biological processes, ultimately leading to the death of the insects.

Microbial insecticides are valued for their specificity and reduced impact on non-target organisms, making them a preferred option in many integrated pest management strategies. By understanding the role of these biological agents in pest control, applicators can employ methods that are not only effective but also environmentally responsible.

Chemical insecticides, while effective, rely on synthetic compounds and can sometimes lead to broader ecological impacts. Botanical insecticides are derived from plant materials and may also be less selective compared to microbial variants. Systemic insecticides, on the other hand, are absorbed by plants and can affect insects that feed on them, but they do not consist of spores or microbes themselves.