Could You Have Bacterial Leaf Scorch on Your Cedar Elm?
March 20, 2014
As Cedar Elms begin to leaf out, you may see some rust colored markings around the leaf edges. If so, you could have bacterial leaf scorch. While sometimes “burned” edges on leaves could be mistaken for physiological leaf scorch, such as from drought damage, it’s always best to have a Certified Arborist come out to properly diagnose your tree.
Bacterial leaf scorch is caused by an airborne pathogen that first infects the foliage of the tree. They cause affected leaves to burn, curl and drop prematurely. Over time, the bacteria spreads, eventually causing entire branches to die and the whole tree to decline. At some point, the tree will need to be removed.
Prevention is always the best medicine.
Proper pruning and watering go a long way to keeping trees healthy. Vigorous trees are better able to fight off diseases and pests that pray on weakened trees. Once a tree has been infected, however, they’ll need to be properly treated to prevent decline.
Now is the time to treat cedar elms.
We use an environmentally friendly injection treatment that is taken up systemically through the tree. As new leaves emerge, foliar applications of our Seasons compost extract will help prevent mildew and rust by coating the leaves with beneficial fungal organisms that will colonize and overtake the damaging organisms. If your cedar elms tend to yellow and defoliate in the summer, you will want to apply Seasons foliar application now.
You can schedule the preventative treatment for your cedar elms now. It’s also a good time to have all trees inspected, as they leaf out, to identify any leftover damage from this past winter’s storms.