The answer to 'when to treat for centipede' is that the best time to treat for centipedes is in the spring and fall. Centipedes are most active during these seasons when the weather is milder, and they are more likely to be found in and around your home. Treating in the spring can help prevent an infestation from developing, while treating in the fall can eliminate any centipedes that have already made their way indoors.
It's important to note that centipedes can be difficult to control, as they are skilled at hiding and can reproduce quickly. For best results, it's recommended to have a professional pest control technician inspect your home and develop a customized treatment plan to effectively eliminate any centipede infestations.