2019•Canadian Journal of Plant ScienceOpen access

Influence of glyphosate/dicamba application rate and timing on the control of glyphosate-resistant waterhemp in glyphosate/dicamba-resistant soybean

Brittany K. Hedges, Nader Soltani, Darren E. Robinson, David C. Hooker, Peter H. Sikkema

Abstract

The objective of this study was to determine the effect of premixed glyphosate/dicamba application timing and rate on glyphosate-resistant (GR) waterhemp control. Glyphosate/dicamba applied to 5-, 15-, and 25-cm-tall plants, controlled GR waterhemp 81%, 73%, and 61% at 2 wk after application (WAA) and 61%, 68%, and 72% at 8 WAA, respectively.

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Key concepts: Glyphosate, Dicamba, Agronomy, Biology, Glufosinate, Weed control