Which of the following is a characteristic of liquid pesticides, non-powered?

Liquid pesticides, non-powered are generally considered inexpensive and easy to use, making them accessible for a variety of applications. This characteristic makes them suitable for both small-scale and larger scales of pest control, as they can be applied with minimal equipment and setup, such as hand sprayers or simple backpack sprayers.

In contrast, the other characteristics do not accurately represent liquid non-powered pesticides. For instance, while they can be effective for herbicides, they are not limited to that category or application, which contradicts the idea of preference for herbicide application only. Additionally, while some advanced applications may require technical training, basic use does not necessarily demand advanced skills, making them more user-friendly for the general public or those with limited experience. Lastly, referring to them being most effective for large-scale work is misleading, as their ease of use and cost-effectiveness make them suitable for various scenarios rather than exclusively large-scale applications.