What type of application involves spraying an undiluted formulation at a low rate per acre?

The type of application that involves spraying an undiluted formulation at a low rate per acre is recognized as Ultra-Low Volume (ULV) application. This method is specifically designed to minimize the volume of liquid used while ensuring effective delivery of the active ingredients. ULV applications rely on the use of specialized equipment that generates fine droplets, allowing for precise targeting of the spraying area, which enhances coverage and reduces waste. This approach is particularly advantageous in wood preservation, where effective penetration and adherence of the treatment product to the wood surfaces are crucial for optimal results.

In contrast, conventional applications typically involve larger volumes of diluted product, while high-volume applications use significant amounts of liquid to ensure coverage. Restricted use application refers to specific pesticides or chemicals that require special handling and are subject to regulatory controls, but does not specifically describe the technique related to undiluted formulations or low application rates.