Md. Code, Agriculture § 5–210

A person may not use, apply, or recommend use of a pesticide other than as specified by the label. The label includes material attached to the container, a brochure, information furnished with the pesticide, or any information contained in the approved State registration of the pesticide. A person may not use, apply, or recommend use of a pesticide in a manner other than as specified by this subtitle or rules and regulations adopted under it.