Flatheaded wood borers (family Buprestidae) are a large and diverse family of beetles known for their often brilliant metallic coloration — many adults are strikingly beautiful, earning the family the nickname 'jewel beetles.' In Arizona, dozens of species are present, ranging from the tiny flatheaded apple tree borer to the large and spectacular Chalcophora species that attack pines. Adults are typically elongated, flattened, and hard-bodied, with a characteristic pointed abdomen. Larvae are distinctive: legless, with a greatly enlarged, flattened head capsule (giving the family its name) and a long, worm-like body. They bore winding, flattened galleries just beneath the bark and into the sapwood of stressed, dying, or recently dead trees and lumber. In structural settings, flatheaded borers most commonly emerge from lumber milled from recently killed trees — the larvae complete development in the wood and emerge through D-shaped exit holes after the lumber is installed. Infestations in structural wood are typically self-limiting (one generation), but the exit holes and galleries can be extensive.
👁Warning Signs
D-shaped exit holes in wood surfaces (the diagnostic sign of Buprestid beetles). Winding, flattened galleries beneath bark of trees. Fine, tightly packed frass. Metallic, elongated beetles near wood or windows.
⚠Health & Property Risks
Tree mortality when attacking stressed or weakened trees. Structural wood infestations from lumber milled from recently killed trees are typically self-limiting but can produce numerous exit holes. Rarely causes ongoing structural damage.
Prevention Tips
Maintain tree health to prevent attacks on living trees. Avoid using lumber milled from recently killed trees. Kiln-dry lumber before use in construction.
🛡Professional Treatment
Structural infestations from lumber are usually self-limiting — no treatment needed beyond cosmetic repair of exit holes. Tree infestations: remove and destroy heavily infested trees; insecticide bark sprays for high-value trees.
Frequently Asked Questions — Flatheaded Wood Borer
The Flatheaded Wood Borer (Buprestidae family) is metallic bronze, green, or black; elongated and flattened and typically measures 1/4–1 inch (varies widely by species). Flatheaded wood borers (family Buprestidae) are a large and diverse family of beetles known for their often brilliant metallic coloration — many adults are strikingly beautiful, earning the family the.
The Flatheaded Wood Borer poses a moderate risk. Tree mortality when attacking stressed or weakened trees. Structural wood infestations from lumber milled from recently killed trees are typically self-limiting but can produce numerous exit holes. Rarely causes ongoing structural damage.
In Arizona, flatheaded wood borers are most often encountered in the following situations: D-shaped exit holes in wood surfaces (the diagnostic sign of Buprestid beetles). Winding, flattened galleries beneath bark of trees. Fine, tightly packed frass. Metallic, elongated beetles near wood or windows.
The Flatheaded Wood Borer is most active during: Spring through summer; adult emergence May–August. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.
Maintain tree health to prevent attacks on living trees. Avoid using lumber milled from recently killed trees. Kiln-dry lumber before use in construction.
Structural infestations from lumber are usually self-limiting — no treatment needed beyond cosmetic repair of exit holes. Tree infestations: remove and destroy heavily infested trees; insecticide bark sprays for high-value trees.
Left unchecked, Flatheaded Wood Borer infestations can cause significant structural or food-storage damage over time. Tree mortality when attacking stressed or weakened trees. Structural wood infestations from lumber milled from recently killed trees are typically self-limiting but can produce numerous exit holes. Rarely causes ongoing structural damage. Early detection and professional treatment are the most cost-effective approach — contact Pest Control Bros for an inspection at the first sign of activity.
Dealing with Flatheaded Wood Borer?
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