Broadleaf herbicide and foliar fungicide options for flax

Objectives

To demonstrate some of the herbicide and fungicide options that are currently registered for flax in Saskatchewan and provide a forum for discussion on the advantages and disadvantages of the different products.

Project Description

Two separate field demonstrations were completed. The first focused on broadleaf herbicide options for flax while the second demonstrated the effects of registered foliar fungicide applications on flax. The demonstration showed that flax yields were significantly reduced with excessive weed competition and increased with all herbicide treatments. In addition, it was found that sulfentrazone applied on its won only applies a narrow spectrum of weeds and additional in-crop herbicide is generally recommended. MCPA on its own did not provide season long control of buckwheat but was effective against many of the weeds present. Foliar fungicide did not provide a significant yield benefit in the absence of disease.