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Certified vs. Qualified: International Recognition of Credentials

The International Society of Arboriculture offers two levels of recognition for arborists:  qualification and certification. The experts at Evergreen Arborist Consultants hold certification from the ISA, one of the highest levels to which an arborist can aim.

What Is The Difference Between Certification and Qualification with the ISA?

While both qualification and certification by the ISA represent an achievement of education and experience, they are not the same distinction.  An ISA-certified arborist, such as those at Evergreen Arborist Consultants, has passed stringent examinations over a broad body of knowledge.  Certification also requires periodic renewal after showing that the arborist has updated his or her knowledge in the field.  Certification is considered the best base for an arborist who may be confronted with a variety of situations. Read more

man cutting trees

Always Watch Out For Hazards When Cutting Trees

Cutting trees and limbs can be a very hazardous job, particularly when the damage has been caused by a storm.  Hurricanes, monsoons, tornados and heavy wind events can all lead to structural damage to a tree.  Furthermore, wildfires can damage a tree and cause it to become unsafe.

When cutting trees down, however, there is more to consider than simply removing the damaged plant.  Arborists such as the experts at Evergreen Arborist Consultants can provide information and evaluation of damaged trees for property owners, government agencies and others who have an interest in discovering the solutions to these issues. Read more

Pacific Palisades Tree Failure

In June 2006 in Pacific Palisades, a large carob tree fell over and crushed an unoccupied SUV. The street was closed while emergency crews cleared the street. A couple days later, a large limb off a eucalyptus tree fell a block from where the carob had failed. NazairoSauceda, from the Bureau of Street Services in the Public Works Department, commented on the tree failure, “We are investigating the tree that failed. They don’t fail like that typically.” The carob tree failed at the root ball and when it fell over, it totaled the SUV. Michael McRoskey, the owner of the SUV, said, “The scary part is if someone had been driving down that street around noon, they’d be dead.”

Tree failures are caused for a number of reasons, and each tree needs to be inspected individually for signs of over-weighted canopy, root damage due to construction, or overwatering and underwatering.

Before this incident, two other carob trees had failed at their roots and three other eucalyptus trees had shed large branches in Pacific Palisades. Residents have expressed concern over the potential hazards, but street tree superintendent Ron Lorenzen explained that there are about 700,000 street trees that are on a pruning schedule, but that the city only has funding to trim about a tenth of those trees each year. That means that the trees are on about a nine to ten year pruning schedule.

One local arborist commented that the city needs to have more funding up front for the care of the trees instead of having to pay legal expenses for damages once a tree fails.

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.Please call us today for a consultation.

Hong Kong’s Heritage Trees are Failing

tree failure

tree failure

Hong Kong has removed many of its heritage trees in the past eight years due to typhoons and disease (the government’s definition of natural causes). Even with these removals, many trees are still failing and causing accidents. In August 2008 a coral tree that had a fungal infection fell in Stanley Market and killed a schoolgirl. In July 2012 another diseased heritage tree fell over in Park Lane Shopper’s Boulevard and injured five pedestrians.

The tree that fell in Park Lane Shopper’s Boulevard had brown root rot, and many other trees in the city are also becoming infected. The source of the infection is believed to be a dying banyan tree in Kowloon Park, and the spread of the disease has been through the air and the soil. Guidelines show that a tree infected with brown root rot should be burned and the soil replaced to keep the disease from spreading. Unfortunately, these guidelines aren’t adhered to for each tree that is being removed, and many believe this government negligence is increasing the problem.

Thirteen new trees have been added to the heritage list in the past few years to make up for the losses. The government lists heritage trees as old and valuable with the truck diameter greater than one meter, be of a rare species, be more than 100 years old, be of cultural or historical significance, or have an outstanding form.

 

Windstorm Damage

Trees

Trees

On December 18, 2012 people in Los Angeles and Ventura County suffered power outages from high winds. In all about 17,000 Southern California Edison customers were affected. Beverly Hills reported winds of 45 mph, and in Malibu, Saugus, and Newhall Pass the winds were approximately 50 mph. The winds caused a tree to fall on a pickup truck in downtown Los Angeles. There were no injuries.