It has destroyed pear and apple orchards in much of North America, in parts of Europe, and in. According to the current assessment, the risk is low for the state. Growers are encouraged to check the model regularly for the most accurate analyses and county-specific forecasts. Fire blight largely affects members of the rose family (Rosaceae). Hosts: Plants in the rosaceae family, notably apple, pear, pyracantha, cotoneaster, and photinia. The map overview presented here indicates fire blight risk as of Ma(Figure 1). Causal agent: Erwinia amylovora, a bacterium. Fire blight is a disease that can infect apples, pears, and certain. Remember that apple and pear trees must be in bloom for predictions to be accurate. Rhoda Burrows Professor & SDSU Extension Horticulture Specialist. Diebackof twigs and branches,as well as shriveling of flowers,occurs in warm, moist weather affected tissues turn very dark and twigs are crook shaped. Fire blight is the most destructive bacterial disease affecting plants in the rose family, including apple, pear, crabapple, hawthorn, cotoneaster, mountain ash, quince, rose, pyracantha, and spirea. Growers can assess local risk by selecting their county and orchard history. This model incorporates the previous 4 days of weather data plus adds a 7-day forecast for estimating leaf wetness and temperature (thereby estimating the risk for bacterial growth and infection). There are 66 Mesonet weather stations throughout Kentucky, thus, weather information for the model is based on data from the closest weather station. A mobile (phone or tablet) friendly version of this site is here. Fire blight is a bacterial disease that affects only plants in the rose family such as apple, pear, loquat and pyracantha roses are not affected. The risk for infection can be assessed using the Fire Blight Disease Prediction Model. Infection by the fire blight bacterium occurs during bloom, thus, protectant antibiotics should be applied when the risk is high. ![]() ![]() Apple and pear trees are at or approaching bloom.
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