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Pruning out affected branches will not eliminate the Boxwood Blight fungus from American boxwood. It is important to keep in mind that although visibly diseased branches may be pruned out, However, there is not enough research at this time to know how efficacious this approach will be over time in

* This alternative approach was proposed in response to reports of growers who rejected the option of removal of very largeĪmerican boxwood. used for holiday greenery) and boxwood tippers Best Management Practiceīest Management Practices for Boxwood Blight in the Virginia Home Landscapeīest Management Practices for Boxwood Blight in Virginia Production Nurseries WITHOUT Boxwood Blightīest Management Practices for Boxwood Blight in Virginia Production Nurseries WITH Boxwood Blightīest Management Practices for Virginia Retail Nurseries WITHOUT Boxwood Blightīest Management Practices for Virginia Retail Nurseries WITH Boxwood Blightīest Management Practices for Boxwood Blight for Boxwood Greenery Producersīoxwood greenery producers (i.e. Each BMP is specialized for individual boxwood growing situations. Certain weather conditions must be present, though, for the fungicide to work most effectively.The following BMPs are guidelines for boxwood growers to avoid introduction of the boxwood blight pathogen or, if the disease is already present, to manage the disease in the most effective manner and avoid spread of the disease to new locations. We can also spray your shrubs with a fungicide to prevent the fungus from attacking them. All parts of the plant infected with the fungus will need to be cut off and removed from the area. What do I do if I think I see it on my shrubs?Ĭall us! There is no cure for boxwood blight. Left to continue, the fungus will defoliate your shrub. If you have a magnifying glass and look at the black streaks after periods of rain or in high humidity, you will see more of the white spores emerging. Something else to look for is narrow, black streaks on the green stems. It shows up usually during times of heavy humidity. The undersides of the leaves may show white patches called sporulation. The fungus starts out as black spots on the leaves: Here’s a healthy one: What should I look for? They are almost always hardy and resistant to pests and disease–except for this one particular fungus. They are very popular in the area because they are deer-resistant and you can shear them into just about any shape, so they’ll fit into any style of yard. Boxwoods are evergreen shrubs with small, glossy leaves. If you have any boxwood shrubs in your yard in south Jersey, you need to be on the lookout. The fungus does not bother the roots of the plant, but it will affect everything above the ground. What is boxwood blight, anyway?īoxwood blight is a fungal disease caused by a fungus called Calonectria pseudonaviculata. Basically, the advisory states that the recent warm temperatures and abundance of rain in the area is making an ideal climate for boxwood blight to spread.

The Plant and Pest Advisory just put out an alert: there’s boxwood blight in the area.