Connecticut was among the states to first report a heavy incidence of the disease and our area continues to be strongly affected. Boxwood Blightīoxwood blight was first detected in the United States in 2011 and is gradually spreading across the country. Keep in mind that a single plant may have multiple problems simultaneously, and display symptoms of diseases, insects and of poor care and conditions. Caring for and maintaining your plants properly, as described on the first page of this guide, is the best defense against these diseases. Most of these diseases, other than boxwood blight, affect plants that are weakened by environmental and cultural stressors. It affects all boxwood types as well as the related plants Sarcococca and Pachysandra and potentially others.īut boxwoods are susceptible to numerous diseases, some of which are common in the New York area. Of current, intense concern, boxwood blight is an aggressive fungal disease caused by Calonectria pseudonaviculata. ![]() Plant discoloration and decline, in whole or in part, is frequently a problem of care and environment but also may be disease-rooted. If boxwoods grown for commercial sale are infected, they should be destroyed and not sold.The telltale dark spots of boxwood blight ( Calonectria pseudonaviculata) photo courtesy of Flickr cc/ Orgeon Department of Agriculture
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