Disadvantages of Chemical Control Methods: Chemical pesticides are highly toxic and can cause health issues to any living organisms in contact with it. Chemical pesticides leave residue everywhere. In the case of plants, they may cause plant diseases or kill beneficial insects.

Effectiveness. As previously mentioned, DIY jobs are generally only effective for small-scale pest problems. If you're dealing with a larger-scale infestation, a professional job is more likely to be effective.

Physical pest control methods use traps or physical barriers to exclude or capture pests. These methods are often non-toxic and are typically most effective for small-scale pest problems. Their limitation is that they often capture only adult pests and leave eggs and larvae intact.