Why should pesticides not be applied on greasy surfaces?

Pesticides should not be applied on greasy surfaces primarily because their effectiveness will be decreased. When pesticides are applied to a greasy layer, the oils can interfere with the ability of the active ingredients in the pesticide to adhere to and penetrate the surfaces or pests they are intended to target. This interference can lead to reduced efficacy, meaning that the product may not work as intended in controlling pests.

When pesticides cannot properly contact the pests or surfaces due to a greasy barrier, it diminishes their performance and increases the likelihood that the intended pests will survive. Additionally, greasy surfaces can prevent the pesticide from spreading evenly, leading to inconsistent applications that compromise pest control efforts. Therefore, ensuring that surfaces are clean and free from grease is essential for maximizing the effectiveness of pesticide applications.