Carefully used, glyphosate has less impact on apple tree health than was once feared. After studying the matter for more than ten years, Dr. David Rosenberger has reached some conclu- sions about the use of glyphosate (Roundup) herbicide to control weeds in apple orchards: while glyphosate can have negative impacts on apple tree health, those impacts are less significant than initially feared, and glyphosate can be used in apple orchards if applied carefully. Rosenberger, who is a plant pathologistand heads Cornell University's Hudson Valley Laboratory in Highland, New York, plans to retire at the end of this year.
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