There was an infection period overnight in all areas. Mature cups are probably still in most fields. Almost finished in Waldo, Lincoln and Knox counties but still probably around. There are lots of mature cups producing spores in Hancock and Washington counties. Your plants are susceptible all through development. Please see the table below for approximately when the infection period started in our monitored fields.
If you applied fungicide within the 7 days before the start of the infection, your plants were probably protected during this infection period.
If your last fungicide application was before Thursday, April 26th, you may want to apply fungicide again.
You have until 72 hours after the start of the infection period in your area to apply fungicide and kill off any infection that may have occurred.
You will want to take into consideration if pollinators are in your field, in your decision to apply fungicide.
NOTE: The Silby Plain (Aurora) and Montegail pond (Township 19) fields had 2 infection periods, one over Thursday night and one over Friday night.
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