If annual meadow-grass is a potential problem in establishing spring barley, then a residual herbicide is the best option for effective control. This is particularly relevant to reduced tillage systems where annual meadow-grass can become a significant problem. The downside to residual herbicides is that they don’t work well in dry soil – less likely to be an issue this year, although some soils are currently quite dry. There are gaps in the weed spectrum of these residuals, so a follow-up post-emergence herbicide may be needed.
Wild oats are a common problem in spring barley. They can be treated pre-emergence of crop. When used to control wild oats, tri-allate can also control moderate populations of annual meadow-grass. The alternative to or as a follow-up is to use a post-emergence graminicide once the germination of wild oats is complete.
Residuals used to control annual meadow-grass control a range of broad-leaved weeds as discussed above.
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