Biological control is the foundation of the differentiation between native species living in complex ecological balance and non-native invasive species. It is nature's method of maintaining ecological balance. Herbicide application and human-managed labor such as mowing, tilling, and pulling may be preferred for managing unwanted vegetation on land that is highly-disturbed by human activity, such as agricultural land. For more complex ecosystems such as forests, effective biological control can eliminate or greatly reduce adverse impacts such as trampling and other physical disturbance such as soil compaction, the spreading of seeds from clothing, chemical toxicity, unwanted damage to non-targeted species, demanding human labor, petrochemical consumption, and other factors. Biological control agents are being evaluated for their effectiveness in controlling "Microstegium vimineum" as well as their chance to become pests themselves.