Tolerance” The concept of Tolerance of Pest Damage is also an important one in IPM. The goal is not to kill every last bug out there but to manage populations at tolerable levels-and that tolerance level is called the Economic I njury Level“Tolerance” ❚ The concept of Tolerance of Pest Damage is also an important one in IPM. ❚ The goal is not to kill every last bug out there but to manage populations at tolerable levels - and that tolerance level is called the Economic I njury Level