What is the primary use of fenthion in Rid-A-Bird?

Fenthion is an organophosphate insecticide primarily used for controlling certain pests. In the context of Rid-A-Bird, its main application is for pigeon control. This substance is effective in managing bird populations, particularly by targeting pest birds that can become problematic in urban areas and agricultural settings. Since Rid-A-Bird is specifically formulated for use against birds, utilizing fenthion for this purpose maximizes its effectiveness in reducing the pigeon population, thereby addressing issues such as contamination and property damage often associated with these birds. The other options refer to different pest problems that require distinct solutions and are not applicable to the specific focus of Rid-A-Bird.