Ultra low volume spraying is characterized by:

Ultra low volume spraying is characterized by applying a very small amount of pesticide per acre, specifically less than two tablespoons of liquid per acre. This method is designed to reduce the amount of spray needed while still achieving effective pest control. It allows for a more targeted application, minimizing the environmental impact and reducing the overall volume of chemicals released into the atmosphere.

This approach is particularly effective against mosquitoes and other pests, as it utilizes highly concentrated formulations that can disperse efficiently in the air. Using such low volumes helps ensure that the active ingredients are delivered to the pests while limiting exposure to non-target organisms and reducing pesticide residues.

In contrast, other options are either too broad or do not accurately represent the characteristics of ultra low volume spraying. For example, more than two tablespoons per acre would not qualify as ultra low volume, and normalization of spraying rates or variable rates would not be specific to the ultra low volume technique itself.