Volutella Blight on Pachysandra
Gail Ruhl, Sr. Plant Disease Diagnostician, Dept.
of Botany & Plant Pathology, Purdue University
Volutella stem and leaf blight is the most devastating fungal
Pachysandra. This disease can destroy large areas in a bed. Infected
leaves first develop tan or brown blotches with dark brown margins,
expand, often with concentric lighter and darker zones. Stem and
cankers can become numerous and plants start to wilt and die. Cankers
appear as water-soaked diseased areas, turn brown, shrivel and
the stem. Orangish spore masses develop in the cankered areas and
underside of infected leaves.
Volutella blight of pachysandra is often associated with plant
as recent transplanting, exposure to bright sunlight, shearing,
insects, and previous winter damage. Normally this disease does
damage to vigorous plants, thus providing good growing conditions
most important control measure.
Applications of fungicides such as chlorothalonil
or mancozeb can help if
multiple applications are made during periods of active growth
pachysandra (much of the growing season, unfortunately), but it
reported that mowing the planting when foliage is dry to 1-2" (with
attached to catch the diseased tissue), and avoiding overhead
are often the more practical solutions.
Severely diseased plants with basal stem cankers should be dug
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only for the state of Indiana
Click image to enlarge
Dieback due to Volutella blight
Stem cankers and blighted leaves
Spore masses forming on stems during moist conditions