Gold Spotted Oak Borer • Small, bullet-shaped beetle about 10mm long • Adults are a dark green with metallic sheen and have 6 gold spots on their wings • Native to Arizona, but in California it is invasive and detrimental to the health of specific types of oak trees Identifying Characteristics
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Gold Spotted Oak Borer Small, bullet-shaped beetle about 10mm long Adults are a dark green with metallic sheen and have 6 gold spots on their wings Native.
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Gold Spotted Oak Borer
• Small, bullet-shaped beetle about 10mm long
• Adults are a dark green with metallic sheen and have 6 gold spots on their wings
• Native to Arizona, but in California it is invasive and detrimental to the health of specific types of oak trees
Identifying Characteristics
Gold Spotted Oak BorerLifecycle
Eggs
Larvae & pupae
Adult borer
2
Emerald Ash BorerCommon Host Trees
• Coast Live Oak• California Black Oak• Canyon Live Oak
Coast Live Oak
California Black Oak
Canyon Live Oak
3
Gold Spotted Oak BorerMap – Range of Gold Spotted Oak Borer
American Elm
4
1. Red or black staining on bark
2. Blistering and oozing on tree surface
3. Premature leaf loss or damage to leaves
4. Crown thinning and branch die-back
5
Gold Spotted Oak BorerWhat to Look For
1 2
3 4
1. Red or black staining on bark
2. Blistering and oozing on tree surface
3. Premature leaf loss or damage to leaves
4. Crown thinning and branch die-back
6
Gold Spotted Oak BorerWhat to Look For
1 2
3 4
1. Red or black staining on bark
2. Blistering and oozing on tree surface
3. Premature leaf loss or damage to leaves
4. Crown thinning and branch die-back
7
Gold Spotted Oak BorerWhat to Look For
1 2
3 4
1. Red or black staining on bark
2. Blistering and oozing on tree surface
3. Premature leaf loss or damage to leaves
4. Crown thinning and branch die-back
8
Gold Spotted Oak BorerWhat to Look For
1 2
3 4
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LATE SPRING:Mature larvae present
in trees
WINTER/FALL:Split bark; woodpecker damage most obvious