What pesticide type is designed as an insecticide formulation in a spray can?

Aerosols are a specific form of pesticide formulation that allows for the application of insecticides in a convenient and effective spray can format. This type of formulation is designed for easy handling and application, which can provide targeted pest control. The aerosol can creates a fine mist or spray that ensures uniform coverage of surfaces where pests may reside, making it particularly useful for indoor applications or localized treatment of insects.

In contrast, other options represent different forms of pesticide delivery. Baits are typically designed to lure pests, often in solid or gel forms, and are not packaged as aerosols. Liquid baits may involve a liquid formulation but are generally not dispensed in aerosol cans like the option in question. Granules are solid pesticide formulations that require different application techniques, typically involving broadcasting or incorporating into the soil, rather than spraying. This distinction helps clarify why aerosols are the correct answer for a pesticide type designed for application in a spray can.