Borers are classified as many types - simply put, they are insects that bore in the woody parts of plants.
With drought comes the potential for increased borer activity because trees are weaker and more susceptible to attack.
Borer larvae feed underneath the bark, creating multiple tunnels that cut through the water-transporting layers of wood, interfering with the water supply to branches and needles.
Healthy trees are the best defense against borers. Treat trees adjacent to borer activity with a protective spray to prevent beetle entry into the wood.