Healthy trees will not be affected by insects and diseases as much as sick
trees are. That is your first line of defense. However what to do until the tree gets
healthier is very important.
Learn to use a refractometer and know what a good healthy tree reading would produce in a refractometer?
Plant pests and diseases play an important role in
controlling the tree population. Not all tree pests are harmful to the tree some are
beneficial.
Learn to identify the symptoms of plant problems, experience will teach you.
Here is a listing of various possible insects which attack trees and their Natural Controls, Causes and Associated Nutritional
Deficiencies (AND), are listed in order of cause at end of each.
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