Deep root fertilizing maintains trees and shrubs in a vigorous condition, increasing their resistance to injury from diseases and insects. In Arizona's harsh environment, nutrient deficiencies are particularly dangerous as trees are forced to compete for water and nutrients.
Trunk injections are the most effective alternative to spraying or soil applied pesticides for tree insect or pest control. Formulations are injected directly into the trunk, where it is quickly taken up by the vascular system and distributed throughout the entire tree.