Understanding Interactions with Winter Wheat Herbicides with Cold Temperatures and Fungicides
July 31, 2012
With $100,000 in funding the Grain Farmers of Ontario developed this project to determine which herbicides are more injurious to winter wheat. Specifically, the project set out to determine if tank mixes of herbicides with fungicides result in greater crop injury and whether or not crop injury from herbicides and fungicides is accentuated with cold night time temperatures. The project also aimed to understand the underlying mechanisms behind such injury by examining their physiological basis.
Field trials were conducted at the Elora Research Station, the Woodstock Research Farm, the Huron Research Station and the Ridgetown Campus of the University of Guelph. Growth chamber experiments were conducted at the main campus of the University of Guelph. Knowledge of which herbicides and herbicide/fungicide combinations cause the highest crop damage was generated. In addition, the impact of environmental conditions on crop injury was identified. It was concluded that herbicide injury is not enhanced by cold conditions. In some cases, injury occurred under warmer conditions. Cold temperatures during herbicide-fungicide applications did not lead to crop injury; it was the specific herbicide-fungicide mixture that caused injury.
Investment in this project was provided by Agriculture and Agri-Food Canada's Adaptation Programming and administered by the Agricultural Adaptation Council.