In our previous article, What is Integrated Pest Management (IPM)?, we discussed what Integrated Pest Management (IPM) is and the four controls used in IPM programs to treat and prevent pest issues within your landscape. These four controls are: biological, mechanical, cultural and chemical. Some of these controls are fairly self explanatory and easily understood. For example, pulling weeds by hand would be considered a cultural control. However, one control that is not as widely understood (and requires a special understanding or background before implementation) is biological control. So, today I would like to discuss in greater detail what a biological control is and how it may be used in your Integrated Pest Management (IPM) Program.