Final answer:
The statement 'USA has restricted entry of Bio controls' is false as biological control methods are a standard practice in the US and not widely restricted.
Step-by-step explanation:
The false statement about biological controls is 'USA has restricted entry of Bio controls.' The application of biological control methods is a well-established practice in the United States and is not broadly restricted. In fact, it has often been used against non-native pests and can be combined with traditional pesticides.
While biological control has been successful in many cases, not all pests have a biological control solution due to various ecological or biological constraints. Therefore, the integration of biological agents with other pest management strategies is sometimes necessary to achieve effective control.