Nowadays, just the word blight can send gardeners into a tizzy. Triticonazole (Fungus Clear Ultra) is labelled for the control of other diseases on ornamentals and could therefore be used legally on box (at the owner's risk) to try and control box blight. The remaining leaves on the shrub will turn yellow and plant growth will cease. Use new or sanitized pots and flats for boxwood production. We serve the Piedmont, Sandhills, and Triangle areas of North Carolina. Once introduced to a landscape, boxwood blight is very difficult and costly to control with fungicides. Management approaches to boxwood blight may differ, depending on whether the boxwood is planted in a landscape, commercial nursery, historic garden or boxwood greenery-producing site. vi. 37110. Since box blight attacks the leaves and stems of plants, the first task … Boxwood Blight treatment. protect boxwood from blight. Benefit from an annual pruning … Leaves turn yellow, darkening to tan as the disease progresses, often with black streaks on the petioles (small stems that join the leaves to the branch). * Clean off the soles of your shoes before moving from one part of the garden to another. Actiferm 2 Litre Bag in a Box (Vacuum-packed) Spray whole area (good soaking) of the plant with Actiferm. TOPBUXUS Health Mix is a leaf fertilizer with trace elements at 100% natural base. Cylindrocladium buxicola is divided into two genetic types which differ in their sensitivity to some fungicides (triazoles). Mulch around the boxwood to reduce the splash of overwintering spores that may be present in fallen leaf debris. Currently, free testing for boxwood blight is available through the UW-Madison Division of Extension Plant Disease Diagnostics Clinic (https://pddc.wisc.edu/). When conditions favor development of boxwood blight, consider fungicide treatments as a preventive measure. To easily and quickly clean shoe soles, wear rubber or plastic garden shoes or boots, then dip them into the bucket of disinfecting solution used for the pruning shears. Strengthens your box tree, produces healthy green, shiny leaves and protects from box blight. As the name suggests, boxwood blight is a disease that only affects boxwood (genus Buxus).However, there are several common landscape plants that can host the fungal pathogen (Calonectria pseudonaviculata) that causes the disease.These include the plants from the Buxus family: Best management practices for each situation have been developed by several states, including Connecticut and Virginia. Boxwood Blight is a fungal disease (Calonectria pseudonaviculata) that affects all top growth of the plants that it has infected. Once boxwood blight has been reported near your location, you may want to consider using preventative fungicide treatments for management. All species and varieties of boxwood are considered susceptible. Boxwood Blight The fungus Calonectria pseudonaviculata (Cylindrocladium pseudonaviculatum) causes severe defoliation and death of container grown boxwoods, and dieback in in-ground plantings. Boxwood blight is found throughout Europe, and has spread to North America. Boxwood Blight. Cylindrocladium buxicola and Cylindrocladium pseudonaviculatum) Printable PDF Click on images to see larger view Boxwood blight is a serious disease of boxwood… Asian species generally exhibit greatest … Boxwood blight, is a relatively new disease and may be a possibility, if new boxwoods have been introduced into your landscape. iv. … The wet shrubs are at a weakened stage and more susceptible to attack from a fungus. Remember that fungicides can be an effective preventive measure, but they are not a cure. In this blog we discuss the cause and favorable conditions of the disease, how it spreads, what the disease looks like on boxwoods, and finally prevention and boxwood blight treatment. By: Mary H. 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