What does photodecomposition refer to?

Photodecomposition specifically refers to the process where light, particularly ultraviolet light, leads to the breakdown or degradation of substances, such as pesticides. This process can significantly affect the efficacy and persistence of pesticides in the environment. When pesticides are exposed to sunlight, the energy from the light causes chemical bonds within the pesticides to break down, resulting in their transformation into simpler, less harmful compounds. This phenomenon is critical for understanding how pesticides behave in aquatic environments and helps in assessing their environmental impact and potential residues in water bodies. Understanding photodecomposition is essential for effective pest management and in minimizing negative effects on aquatic ecosystems.