Pine bark beetles in Arizona are generally of the genus Ips or Dendroctonus. Fading foliage in the tree is often the first sign of a beetle attack. Prevention is best practiced since control is not possible once the beetles have successfully colonized the tree.
Piñon ips is a native bark beetle that utilizes piñon pine inner bark and outer sapwood for food and to rear offspring, spending most of their lives underneath the bark of the tree. When a new generation of adults emerge from an infested tree they may re-infest the same tree or fly short distances.
Bark Beetles are tiny naturally occurring insects that contribute to the death of thousands of trees in the Southwest each year. Most species of conifers are utilized by bark beetles. Even freshly cut logs are an ideal host for many bark beetles.
Often property owners or land managers have several trees of significant value to the landscape. These trees may be prized for their size and/or aesthetic value. With the recent extreme drought conditions, the bark beetle has become a formidable pest.
Blister beetles belong to a family of beetles called Meloidae. This family contains approximately 300 species distributed across the continental United States, including 150 in Arizona. Blister beetles have a peculiar life cycle.
The pruning principles discussed in this publication have proven to provide the best possible out comes including tree longevity and safety. Although trees may live for years following improper pruning their life span and safety may be severely reduced.