Borers are insects that infest and damage various types of trees, shrubs, and woody plants by tunneling into their wood. There are several types of borers, each targeting different plant species and causing various degrees of damage. Here are some common types of borers:


1. Emerald Ash Borer (Agrilus planipennis): This invasive species targets ash trees and is known for causing widespread damage to ash populations in North America. The larvae tunnel under the bark, disrupting the tree's ability to transport nutrients and eventually killing it.


2. Asian Longhorned Beetle (Anoplophora glabripennis): These beetles have a wide host range, including various hardwood trees such as maples, poplars, and willows. Their larvae bore deep into the wood, weakening and often killing the host tree.


3. Bronze Birch Borer (Agrilus anxius): As the name suggests, this borer primarily infests birch trees. Larvae feed under the bark, creating winding tunnels, which can lead to branch dieback and the eventual death of the tree.


4. Pine Bark Beetle (Various species): Pine bark beetles are a group of insects that infest pine trees. They bore into the inner bark, disrupting the tree's vascular system and causing pine tree mortality, particularly during outbreaks.


5. Apple Bark Borer (Scolytus mali): As the name suggests, this borer affects apple and other fruit trees by tunneling into the bark and wood, often leading to tree decline and reduced fruit production.


6. Oak Bark Beetles (Various species): These borers target oak trees, both hardwood and ornamental varieties. They create galleries under the bark, which can weaken and eventually kill the tree.


7. Dogwood Borer (Synanthedon scitula): This borer infests dogwood trees and shrubs, tunneling into the trunk and branches. Infested trees may show wilting, dieback, and overall decline.


8. Lilac/Ash Borer (Podosesia syringae): These borers can affect both lilac and ash trees. They tunnel under the bark and can cause dieback and canopy thinning.


9. Plum Curculio (Conotrachelus nenuphar): Although not a traditional borer, this weevil pest damages a variety of fruit trees, including plum, apple, and cherry, by creating crescent-shaped scars on the fruit.


10. Fruit Tree Borers (Various species): Different species of borers target fruit trees such as peach, cherry, and pear, causing damage to the trunk, branches, and sometimes fruit.


Effective management of borers often involves early detection, pruning and removing infested branches, insecticide treatments, and maintaining tree health to prevent infestations. The specific types of borers you may encounter can vary depending on your region and the types of trees and plants present.