Stewart Clark

  • Director of Research and Development
  • TERRO®
  • Lititz, PA   
  • Website


Contact me for: TERRO® is an industry leader in ant and pest control and has been a trusted brand for more than 90 years. The company offers proven ant and pest control products including liquid ant baits, aerosol sprays, perimeter granules and ant dust products.

Stewart Clark, a trained chemist and biologist, has worked for nearly 30 years developing products to control ants and other household pests. Clark currently serves as the Director of Research and Development for TERRO®, a leading manufacturer of DIY pest control products. His work at TERRO includes traveling the country to meet with leading entomologists to evaluate the latest pesticides and delivery systems available. This research has helped Clark develop and expand TERRO’s line of pest control products. TERRO products are designed to put pest control back in the hands of homeowners with a line of easy-to-use products.

What makes ants, in particular, so interesting to Clark? “They’re fascinating creatures,” he says. “They are such social insects, and we’re just beginning to understand how they live and communicate.”

No matter how complicated and fascinating ants are to study, however, most people do not appreciate them creeping around kitchens and crawling around bathrooms. This is where Clark comes in. Regardless of what region of the country you live in, or what type of ant you are battling, Clark can help. As one of the country’s leading ant control experts, Clark helps educate people on how to keep ants out of their homes and out of their lives. He has been a guest on numerous home and garden radio and TV shows throughout the country.

Visitors to may submit ant control questions to Clark and his team using the “Ask the Expert” form.

Meet the expert

Books & Applications

Expert Articles by Stewart Clark

Home Improvement

Prevent and control ant infestations in and around your home
Ant infestations can be controlled with different strategies, including ant baits and contact killers. Strategies to prevent further infestations include sanitation and exclusion efforts. It is import...

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