Stressed spring barley and Ramularia
It is dry and foliar symptoms of Ramularia are more prevalent in crops that are stressed by environmental conditions.
With the loss of Chlorothalonil (CTL) the industry has lost a very effective active ingredient that reduced the severity of Ramularia. That now puts more pressure on all the remaining fungicides of which the triazoles are your next best choice. Folpet could also be used, however don’t be fooled into thinking that a rate similar to CTL is going to work – it won’t!