Choosing a herbicide program for an orchard is not so simple as choosing which herbicide kills what weeds and when. A careful reading of the label of any herbicide reveals a host of warnings, most of which deal with tree safety. Wayne Mitchem, a weed control specialist from North Carolina State University who serves growers in South Carolina and Georgia as well, says growers should know what those label warnings are and take them seriously. When an herbicide becomes cheap, broadly effective, and widely used—as happened with glyphosate—­growers can let down their guard. Mitchem spoke last winter to growers at […]