In case, you have come across a definition about IPM that requires the ability to spray pesticides immediately after identifying a pest problem. You should rest assured that it would not be describing integrated pest management in the right manner. It would be pertinent to mention here that conventional pest control would ignore the cause of pest infestations and rather rely on scheduled, routine pesticide applications.
Pesticides have often been temporary fixes that would be ineffective with the passage of time. Non-toxic and least toxic control products have been a major growth area along with new materials and devices. These have been increasingly people and largely available in the marketplace.