Final answer:
Biological pest control measures are not limited a. to killing non-native pests and can be used as a standalone or preventive method.
Step-by-step explanation:
a) used to kill non-native pests
Biocontrol measures are not limited to killing non-native pests. In fact, biocontrol can be used to control populations of both native and non-native pests. The main objective of biocontrol is to reduce the population of a pest species using natural enemies, such as predators or parasites, without causing harm to the environment or human health.
b) used only when pesticide controls have failed
Biocontrol measures can be used as a standalone method of pest control or in combination with other control approaches. It is not necessary to wait for pesticide controls to fail before implementing biocontrol. In fact, biocontrol is often used as a preventive measure to reduce pest populations before they become a problem.
c) can replace more disruptive or hazardous methods
This statement is true. Biocontrol measures can be a sustainable and environmentally friendly alternative to more disruptive or hazardous methods of pest control, such as the use of chemical pesticides. By using natural enemies to regulate pest populations, biocontrol can minimize the negative impacts on the environment and human health.