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

Microbial insecticides are composed of natural organisms, including bacteria, fungi, viruses, or other microbes, that specifically target and attack insect pests. These biological agents work by infecting the insect, leading to its death through various mechanisms, such as disrupting its growth processes or causing disease.

This approach to pest management is favored for several reasons. Microbial insecticides tend to have a lower impact on non-target species, making them environmentally friendly alternatives to traditional chemical insecticides. Additionally, they often have specific modes of action, allowing for targeted pest control without significant effects on beneficial organisms.

Chemical insecticides, on the other hand, rely on synthetic compounds and generally have a broader action spectrum with potential harm to various non-target organisms. Botanical insecticides are derived from plant sources and may not utilize microbes or spores as their active components. Systemic insecticides are absorbed by plants and affect insects that feed on them, but they do not directly consist of microbial agents.

Thus, microbial insecticides represent a specialized and increasingly popular method in integrated pest management strategies, showcasing the specificity and ecological considerations in modern pest control practices.