Pasadena Beetle Infested Tree



The City of Pasadena decided to take down a massive tree on North Hill Avenue after it was confirmed that the tree was dying due to a beetle infestation. The tree had withstood the windstorm in the area that occurred a year ago and felled many trees in the city, but the tree recently started to look unhealthy. Ed Carney, who lives on North Hill Avenue, said he had someone stop by the house a couple months before the tree was to be taken down, and mentioned the unhealthy tree. Carney had already notified an arborist when he became concerned for the tree, and the arborist inspected the tree several times and identified the beetle infestation. An independent specialist confirmed the results.

The tree was one of the largest trees in the city and was possibly hundreds of years old. The city said it needed to remove the tree due to safety concerns. The removal required a crane and the tree cut down from the top first. During removal, traffic was redirected around the area.

Evergreen Arborists Consultants, Inc. has experience in examining thousands of trees. We evaluate a tree’s signs and symptoms ranging from decay, poor branch structure, poor pruning, and maintenance practices and roots. Evaluation may help reduce possible personal injury and property damage from falling trees or branches. Please call us today for a consultation.

Oak Tree Damage

Cal Fire officials recently spotted a California black oak tree in Idyllwild, CA, that was infested with the gold spotted oak borer. This beetle has already destroyed 80,000 oak trees in San Diego County, but officials hadn’t expected to see it so far outside of the estimated zone of infestation. “Our concern is that it’s been found 40 miles outside the zone of infestation. That’s a long way. How did it get here?” asks Julie Hutchinson, Battalion Chief and Cal fire spokeswoman. Hutchinson thinks it was carried into the Idyllwild area in a load of firewood and cautions people to use firewood where they’ve bought it.

The adult gold spotted oak borer is about a half-inch long and forest green, with six golden spots on its wings. The larvae feed on the soft tissues of oak trees directly under the bark. This soft tissue is the supply route for water and nutrients, and the damage caused by the beetle stresses the tree until the tree dies.

The infected tree was discovered when a Cal Fire employee noticed that the tree had much smaller leaves and the leaves were starting to turn brown. When the tree was checked a few weeks later, the tree was dying and the leaves were brown. About a dozen larvae were extracted from the tree and DNA-analyzed to confirm the species. The tree was subsequently taken down and shipped to San Diego County, within the area the beetle has already infected. The extent of the infestation in Idyllwild won’t be determined until spring, when adults emerge.

Evergreen Arborists Consultants, Inc. has examined thousands of trees. We are Los Angeles certified arborists, tree experts, and tree specialists who provide arboriculture and tree expert advice to Beverly Hills, Brentwood,  West Hollywood, Santa Monica, Malibu, Palos Verdes, Encino, Pasadena, and Sherman Oaks. We specialize in Los Angeles trees, and conducting detailed investigations and providing independent analysis. Please call us today for a consultation.