Which category is not included in the SPCS application categories?

The correct choice indicates that aquatic pest control is not included in the Structural Pest Control Applicator's application categories. The Structural Pest Control Applicator's Training Program primarily focuses on pest management practices associated with structures and the surrounding environments where pests like termites, wood-destroying organisms, and invasive plants may affect buildings and human health.

Understanding where aquatic pest control falls outside this scope is important. Aquatic pest control generally pertains to managing pests and invasive species that inhabit water bodies, such as lakes, rivers, and ponds, while the primary goal of the SPCS is to ensure structural integrity and safety from pests that directly affect residential and commercial buildings.

Therefore, while termite control, seed treatment, and wood preservation relate directly to pests that affect structures, aquatic pest control is recognized as a specialized field with different regulations and methodologies that cater to water-based ecosystems rather than terrestrial ones, hence its exclusion from SPCS categories.