Why is the treatment of the entire water volume often impractical in deep lakes?

Treating the entire water volume in deep lakes is often impractical primarily due to the challenge of ensuring even distribution of the treatment. In deep bodies of water, the stratification and varying temperatures at different depths can lead to issues with the application of pesticides. Achieving consistent coverage across the entire water column is complex, as the chemical can settle or concentrate in certain areas rather than being evenly spread. This uneven distribution may result in insufficient control of aquatic pests, or conversely, non-target organisms might be adversely affected in some areas while others remain untreated. Therefore, understanding the factors affecting treatment distribution is crucial for effective aquatic pest control in deep lakes.