Which of the following state agencies is not involved in pesticide regulation?

The Texas Agriculture Extension Service is primarily focused on research, education, and community service in agriculture and related fields. It provides resources and support to farmers, ranchers, and the community to improve agricultural practices and promote sustainable farming. While the Extension Service may offer information related to pesticide use and safety, its primary mission does not involve the direct regulation of pesticides.

In contrast, the Texas Department of Agriculture, Texas Water Commission, and Texas Structural Pest Control Service all have specific regulatory roles in the management and enforcement of pesticide laws and safety standards. The Texas Department of Agriculture oversees the overall regulation of pesticides, including licensing and safety evaluations. The Texas Water Commission is involved in protecting water quality, which can be impacted by pesticide usage, and the Texas Structural Pest Control Service directly regulates pest control professionals, including their pesticide application practices.