There are many types of tree disease that can infect landscape trees in Baltimore. To properly control a tree disease the disease must first be accurately identified. The best course of action is to contact an arborist in Baltimore to identify the tree disease that is infecting your tree. The identification of the tree disease will dictate what, if any, disease control treatments can be done to help the tree. Most tree diseases can be controlled, but there are a few for which there is no fungicide treatment available.
Tree diseases are separated into two general categories, foliar diseases and vascular diseases. A foliar tree disease attacks the leaves or needles of trees, often causing premature defoliation. A vascular tree disease infects the conductive tissue of the tree, preventing the proper movement of water and nutrients within the tree.
Controlling most foliar tree diseases is a matter of prevention. Fungicides are applied to prevent fungus spores from infecting the leaf tissue after the disease spore germinates. Tree spraying is usually used to control foliar tree diseases.
A vascular tree disease is usually controlled by injecting a fungicide into the tree trunk. Injecting fungicides into the tree trunk does cause wounding to the tree, but these types of disease control treatments often last for 2 - 3 years. Vascular fungicide treatments should be applied by a tree service or professional arborist.