Goldspotted Oak Borer

Goldspotted Oak Borer Removal


The Goldspotted Oak Borer (GSOB) is a flatheaded borer that infests and kills several species of oaks. GSOB is native to southeastern Arizona and possibly Mexico. GSOB completes one generation in a year.

In 2004, GSOB was first detected in survey traps in southern California (San Diego Co.), but it was not linked to tree injury or mortality until 2008. In 2012, GSOB was detected in Riverside Co. and was likely introduced to this new county in infested firewood . The movement of infested firewood was also most likely responsible for additional satellite infestations of GSOB that have been detected elsewhere within San Diego Co., and in Orange Co and now Wrightwood and Big Bear.

In southern California, adults fly from mid-May to early October with peak flight occurring in late-June to early July . The majority of adult flight occurs from June to September.


If you think your oaks are being attacked by GSOB give us a call at (800) 249-0548 and our Certified Arborist will inspect your trees

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