Effects of Glyphosate on Highbush Blueberry (Vaccinium corymbosum L.)

Authors

Laurie Hodges, University of Nebraska-LincolnFollow
Ronald E. Talbert, University of Arkansas
J. N. Moore, University of Arkansas

Date of this Version

2-1979

Comments

Published in HortScience (February 1979) 14(1): 49-50. Copyright 1979, American Society for Horticultural Science. Used by permission.

Abstract

Five-year-old 'Collins' highbush blueberries were treated in August with glyphosate (N-phosphonomethyl glycine) at 0.36, 3.6 and 7.2 g/liter acid equivalent as a spot treatment alone or with pruning or applying paraquat (1, 1'-dimethyl-4, 4'-bipyridinium ion) at 1.2 g/liter to remove green tissue prior to glyphosate application. Initial response was terminal dieback of young canes. Symptoms the following spring included additional terminal dieback, leaf and cane morphological aberrations, and elongation of the flower corolla. One year after treatment, regrowth was normal. There was no effect on blueberry yield the season following treatment.