Symptoms and damage
Bacterial problem One of your pictures suggests that the laurels
are affected by a disease caused by bacterial pathogens (Xanthomonaspruni).
This disease typically starts in early summer with little, brown sores
appearing on the undersides of leaves. The spots grow and develop red borders
and yellow halos. The spots eventually fall out of the leaves, leaving behind
gaping holes and tattered leaf tissue. Many infected leaves look as though
someone peppered them with buckshot.
Because chemical control of shot hole disease is hard to achieve
for home gardeners, help prevent this disease from occurring by planting the
shrub in a well-draining location. Prune out and destroy any infected plant
tissue as soon as you notice it. Rake up fallen plant litter to prevent
pathogens from being attracted to the area near your shrub.
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