06/02/2026
Fire Blight - First Large Outbreak in Eight Years
Fire Blight is a miserable bacterial infection. It causes dieback of apple tree branches and can kill a mature tree is left unattended. This is the worst outbreak we have seen in eight years. Orchards throughout the Midwest are reporting more Fire Blight issues this year than in the recent past.
Fire Blight is controlled with antibiotics such as streptomycin (Yes, that is the same antibiotic often prescribed for children with strep throat). The bacteria that causes Fire Blight can multiply rapidly in warm, wet conditions during bloom. Reportedly, April was the warmest on record in Illinois. In warm conditions, one cell of bacteria can become a billion cells overnight (University of KY). Hail and strong winds can exacerbate the spread of Fire Blight bacteria.
For the past two weeks we have been cutting out Fire Blight strikes. Jonathan, Cortland, Blondee and Fuji appear most susceptible to Fire Blight. Varieties resistent to the infection include Liberty, Goldrush, and Enterprise.
We have a great crop of all apple varieties this year. Fire Blight is only a small hurdle on the path to harvest.