Leaf rust is brewing in some fields planted to rust-susceptible varieties in spite of the recent dry weather. I get the sense that disease severity may increase sharply in fields that have not been treated with a fungicide, and that experience at least one significant rain event over the next 30 days.
Stripe rust is also visible in some fields, but at generally low levels. Hot and dry weather is very unfavorable for stripe rust, and we have had plenty of both during the last month. In addition, some fields are showing late infections of barley yellow dwarf which may result in a shorter grain fill period and limit the leaf rust risk. The main goal when it comes to leaf rust is to keep the flag leaf as clean as possible. Infections in the lower canopy infections have little impact in terms of reducing yield.