What Is a Certified Arborist? Information from the I.S.A.: http://www.treesaregood.com/treecare/Hire_Arborist.aspx An arborist by definition is an individual who is trained in the art and science of planting, caring for, and maintaining individual trees. ISA arborist certification is a nongovernmental, voluntary process by which individuals can document their base of knowledge. It operates without mandate of [...]
Photinia Leaf spots Entomosporium mespili Entomosporium is a fungal disease that spots the leaves of plants in rose family, including apple, crab apple, hawthorn, pear, photinia, pyracantha, quince, and Rhaphiolepis. In the Willamette Valley, we see rampant problems on our Photinia. This disease is more than unsightly; heavy infections will cause defoliation, and death of [...]
Box Elder bugs Boisea trivittatus Boxelder bugs, Boisea trivittatus, is a well-known nuisance insects in the Pacific Northwest. We generally do not notice them in the summer months, as they live quietly in Box Elder or Maple trees. They only become an issue during the early spring or fall, when they can envelop buildings in [...]
Systemic Injection Methods for Tree Insects and Disease If your trees and shrubs become unpleasant and unhealthy, with falling leaves, or sticky dripping all over the ground below, they will loose some of their appeal. Symptoms: Honeydew, a dilute solution of carbohydrates, amino acids, minerals, and other substances is that sticky liquid causing all the [...]
