Which common insecticide is used to kill flies in dairy barns?

The commonly used insecticide to kill flies in dairy barns is lambda-cyhalothrin. This insecticide is part of the pyrethroid class and is effective against a wide range of insect pests, including flies that can be problematic in livestock environments. Lambda-cyhalothrin works by interfering with the insect's nervous system, causing paralysis and death.

While pyriproxyfen is an insect growth regulator that targets the development stages of insects rather than killing them outright, it is often used in conjunction with other insecticides in integrated pest management systems but is not the primary choice for immediate fly control. Temephos, historically used as a larvicide for mosquito control, is less common in dairy barn applications for fly management. Fs-carotene does not serve as an insecticide but is rather a plant pigment and antioxidant.

In summary, lambda-cyhalothrin’s effectiveness, quick action, and ease of use in agricultural settings make it the preferred choice for managing fly populations in dairy barns.