TITLE:
Response of winter wheat (Triticum aestivum L.) to autumn applied saflufenacil
AUTHORS:
Lynette R. Brown, Nader Soltani, Christy Shropshire, Peter H. Sikkema
KEYWORDS:
Cereals; Injury; Height; Herbicide; Tolerance; Yield
JOURNAL NAME:
Agricultural Sciences,
Vol.3 No.5,
September
21,
2012
ABSTRACT: There is limited information on the effect of saflufenacil application timing when applied in autumn to winter wheat. Five field experiments were conducted over a three-year period (2007- 2009) at two locations (Ridgetown and Exeter, Ontario) to evaluate the tolerance of winter wheat to autumn applications of saflufenacil applied pre-plant (PP), pre-emergence (PRE), or post-emergence (POST) at 25, 50, 100 and 200 g a.i. ha-1. As the dose of saflufenacil increased, the amount of injury observed also increased. By May of the following spring, injury ranged from 11 to 20% at the 25 to 200 g a.i. ha-1 doses of saflufenacil. Saflufenacil applied PP and PRE caused little to no injury in winter wheat. Saflufenacil applied POST and POST + Merge in the autumn caused up to 41% injury with the POST + Merge application being the most injurious. However, this injury was transient with no effect on winter wheat height or yield the following summer.