Occasionally generic imidacloprid products and dinotefuran products can be found at a local hardware store. Most big box stores carry more expensive versions of imidacloprid. These “general consumer” products can be useful for treating one or two hemlock but become expensive for treating more trees than that. In the case where you have many hemlocks to treat, generic imidacloprid products are more economical. You can refer to our product comparison chart to see relative prices. Generic imidacloprid products and dinotefuran products are easily found at many online pesticide retailers and can be found in Western North Carolina at some specialty ag and farm stores.
Returning NC's Hemlocks to Long-Term Health