Infestation

A large number of pests in a locality, which is generally within a turfgrass surface where it might be grubs or even earthworms, or on and above the surface where it might be birds who may be looking for a food source from within a sward. What constitutes an infestation will depend on the situation, but if a threshold number of pests has been set as part of an Integrated Pest Management plan, then any number above the threshold might (or might not if the number is small) be considered an infestation.