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Mary Ann Hansen

Title Summary Date ID Author(s)
Angular Leaf Spot of Cucumber May 1, 2009 450-700
Bacterial Spot of Pepper May 1, 2009 450-702
Best Management Practices for Boxwood Blight for Greenery Producers Feb 23, 2015 PPWS-39NP (PPWS-51NP)
Best Management Practices for Boxwood Blight for Professionally Managed Landscapes and Public and Historic Gardens in Virginia

Boxwood blight is caused by the fungal pathogen Calonectria pseudonaviculata (syn. Cylindrocladium buxicola). Boxwood blight was first described in the United Kingdom in the mid-1990’s and by 2002 was found in several other European countries and New Zealand. In September 2011 boxwood blight was discovered in North America. Symptoms of the disease include leaf spotting (Fig. 1), elongate, dark cankers on stems (Fig. 2), defoliation, and dieback (Fig. 3). The primary means by which the disease spreads is the inadvertent introduction of infected boxwood to existing plantings. The pathogen can also spread by spores, which readily adhere to equipment and work clothes, and by microsclerotia, which survive in infested soil and plant debris. This document outlines best management practices for landscapers and property managers to reduce the risk of spreading boxwood blight to landscapes and public and historic gardens, and to manage the disease if it is introduced.

Dec 19, 2014 PPWS-49NP
Best Management Practices for Boxwood Blight in the Virginia Home Landscape: Version 2, January 2015 Apr 9, 2015 PPWS-29NP(PPWS-46NP)
Best Management Practices for Boxwood Blight: Best management practices for Virginia retail nurseries WITH boxwood blight Jun 5, 2014 PPWS-34NP
Best Management Practices for Boxwood Blight: Best management practices for Virginia retail nurseries WITHOUT boxwood blight Jun 6, 2014 PPWS-35NP
Best Management Practices for Boxwood Blight: Best management practices for boxwood blight in Virginia production nurseries WITH boxwood blight Jul 15, 2014 PPWS-32NP
Best Management Practices for Boxwood Blight: Best management practices for boxwood blight in Virginia production nurseries WITHOUT boxwood blight Jun 25, 2014 PPWS-33NP
Botrytis Blight of Peony May 1, 2009 450-602
Boxwood Blight: A New Disease of Boxwood Found in the Eastern U.S. Jan 5, 2012 PPWS-4
Clubroot of Crucifers May 1, 2009 450-705
Corn Smut May 1, 2009 450-706
Crown Gall of Woody Ornamentals May 1, 2009 450-608
Early Blight of Tomatoes May 1, 2009 450-708
Fire or Botrytis Blight of Tulip May 1, 2009 450-607
Hollyhock Rust May 1, 2009 450-613
Impatiens Downy Mildew May 21, 2013 PPWS-19NP
Iris Leaf Spot May 1, 2009 450-600
Phytophthora Root Rot of Rhododendron and Azalea May 1, 2009 450-615
Powdery Mildew of Ornamental Plants May 1, 2009 450-603
Problem-free Shrubs for Virginia Landscapes Feb 12, 2015 450-236 (PPWS-48P)
Problem-free Trees for Virginia Landscapes Feb 18, 2015 450-237 (PPWS-47P)
Rose Rosette Disease Sep 17, 2012 450-620 (PPWS-10P)
Timber Rot of Tomato May 1, 2009 450-712
Verticillium Wilt of Shade Trees May 1, 2009 450-619
Virginia Boxwood Blight Task Force May 20, 2014 PPWS-30
Wire Stem and Bottom Rot of Cabbage May 1, 2009 450-713