The answer to 'when to treat for pest' is that the best time to treat for pests depends on the specific type of pest you are dealing with. In general, it's best to treat for pests as soon as you notice signs of an infestation, as this can help prevent the problem from getting worse. Some pests, like ants and rodents, are more active during certain times of the year, so it's important to be proactive and treat for them during their peak seasons.
For example, many common household pests like ants, spiders, and cockroaches tend to be more active during the warmer months, so it's a good idea to treat for them in the spring and summer. Rodents like mice and rats, on the other hand, may be more of a problem during the colder months when they're looking for warmth and food inside your home.