Small grain disease outlooks based on risk models continue to be encouraging. In general, current weather conditions would suggest the risk for Fusarium head blight (scab) are low. However, rainfall, such as occurred on June 11 and 12, would place susceptible wheat varieties at moderate risk. It is important to begin monitoring growth stage of fields and check for model updates on a regular basis as local fields reach the boot to heading stages.

The models would suggest higher risk in many areas for leaf rust and tan spot. A report from last week by independent crop consultant, Virgil Jons, indicated wheat leaf rust was present at trace levels in a field of Oklee spring wheat in Clay Co., MN on Tuesday, June 6th. Oklee is moderately susceptible to leaf rust and these trace levels were found on leaves in a double seeded headlands area along a shelterbelt, conditions that could favor infection due to higher humidity and longer the longer presence of dew.

For current risk maps:

http://mawg.cropdisease.com