That period of a disorder or paroxysm when the symptoms begin to abate in violence; as, the decline of a fever.
Disease that is characterized by a progressive decline in a tree's health and in its growth and that may kill it. While the causes of this phenomenon are not known, it is generally believed that a combination of factors is to blame: pollution, soil acidification, drought, freeze-thaw action, etc.
A symptom of tree disease or disorder characterized by progressive dieback of branches and loss of leaves. â€œDeclineâ€ is also used to refer to the discoloration of leaves, dieback of branches, premature leaf drop, excessive watersprouting, and other symptoms generally affecting stands of trees. In this general context, â€œdeclineâ€ may better be replaced with specific symptoms.