What is a disadvantage of using ULV applications?

Using ultra-low volume (ULV) applications can indeed lead to the production of a slick residue if they are over-sprayed. This is a crucial aspect to consider because such residues can pose safety issues for humans and pets, as well as creating potential hazards in the treated environment. When applying ULV pesticides, the goal is to deliver small droplets that effectively target pests while minimizing excess application. However, if the application technique is not executed properly—or if there is excessive overspray—this can result in an unwanted and slippery surface that may be unsafe for occupants and may require additional cleaning efforts.

In contrast, ULV applications are typically known for their relatively short residual effect, making them less appropriate in situations requiring long-lasting pest control. Their effectiveness is also dependent on specific pest types and environmental conditions, meaning they might not be universally effective against all pests. Lastly, while ULV formulations can be applied in damp locations, they are not inherently designed specifically for such environments, unlike other formulations that might be more suited for that purpose.