Different pests affect different plants at different times during the growing season. In addition, many pests will have several generations per year, which means they may come back even after successful initial treatment. Ongoing monitoring and treatment will help ensure pests do not cause significant damage. Also, damage will vary from year to year and is impossible to predict, so canceling your service now will leave your plants susceptible to future problems. TruGreen's continuous service will help ensure the health of your landscape plants both today and for the future.