Herbicide selection and timely applications with Dr. Kurt Vollmer

Dr. Kurt Vollmer, a weed management specialist with University of Maryland Extension, discussed effective herbicide use through the framework of the 4 Rs, applying the right herbicide at the right time, at the right rate, and in the right place. He emphasized the importance of understanding herbicide selection, including differences between selective and non-selective products, and highlighted how tank mixing can improve weed control while helping manage herbicide resistance. Dr. Vollmer also covered the importance of application timing, including targeting weeds when they are small and actively growing, and explained how residual herbicides form the foundation of a strong weed management program. The presentation also addressed key factors influencing herbicide performance, including environmental conditions, weed size, and crop growth stage. Dr. Vollmer discussed how improper rates and sublethal applications can contribute to herbicide resistance, and stressed the importance of following label recommendations. He also introduced newer technologies and considerations for targeted applications, including precision spraying and emerging regulatory requirements such as Bulletins Live 2 for endangered species protection. Throughout the talk, he provided practical, research-based recommendations to improve weed control and maintain long-term herbicide effectiveness in cropping systems.