Two Devastating Pests in Orange County Wildlands and Urban Forests.
Speaker: John Kabashima
Date: February 16, 2017 (doors open 6:45 pm, Speaker at 7:30 pm)
Location: Duck Club, Irvine (Directions)
Thousands of trees across Southern California are dying because of invasive beetles. There are currently no remedies. The polyphagous shot hole borer (PSHB) is attacking some of the trees most favored by gardeners, city landscape designers, and universities—maples, elders, cottonwoods, sycamores, walnut, and oaks. Obviously many of our wildland trees are included. Add to this the goldspotted oak borer, originally from southeast Arizona. Already rampant across San Diego County where it was discovered in 2008, it soon made its way to coastal San Diego County and then Orange County in 2014. In 2015, it showed up in northeast Los Angeles County.
What is being done to understand these two insects and how to control them? What is the eventual damage likely to be? What can we do individually? Dr. Kabashima, one of Orange County’s leading experts on these pests, will provide a thorough update.
A native of Los Angeles, John Kabashima started working in his family's nursery business as soon as he was tall enough to water 1-gallon nursery plants. He received his bachelor’s degree in agricultural biology from Cal Poly Pomona, master’s degree in pest management from UC Riverside, an MBA from Pepperdine University, and a doctorate in Entomology from UC Riverside.
Dr. Kabashima retired after 28 years with University of California Agriculture and Natural Resources, having run the UC Master Gardener Program in Orange County, serving as the UC Cooperative Extension environmental horticulture advisorfor OC, and in many other posts. His cutting edge research on invasive species such as the red imported fire ant, the glassy winged sharp shooter, lerp psyllid, and ash whitefly has led to effective management plans. He retains emeritus status conducting further research on both the polyphagus shot hole borer and the goldspotted oak borer and other invasive pests.
John’s achievements in education and research have been recognized by various organizations and in 2014, he and his friend Gary Hayakawa were inducted into the Green Industry Hall of Fame.
CNPS & CLIMATE CHANGE: Debate on why and how CNPS should work on climate change issues has been flowing for many weeks among the CNPS Conservation Committee members. The debate intensified when we became faced with the incoming anti-enviro federal government.
It may seem a no--‐brainer: CNPS works to protect and enhance native plants and the habitats they form, and those plants and habitats are and will be affected by ongoing climate change, so of course CNPS works on climate change issues. But the particulars of climate change’s effects on native plants in relation to CNPS’ existing policies and practices has led to profound discussion of those policies and practices and the philosophy behind them.
Native Gardeners’ Corner—Members’ Tips, Tricks, and Techniques
This column is a regular newsletter feature offering chapter members and local experts a chance to briefly share information on many things related to gardening with natives. The question for this newsletter is: “What is the best garden-related gift you have ever received?”
Sima Bernstein-“The best gift was a banner with the following: GARDENING IS THE SLOWEST OF THE PERFORMING ARTS.”
Jackie Brodsky-“For me (74), the best gift ever was "labor". My grandson dug the holes and I planted each plant with TLC. Bazinga!”
Orchid Black-“Best gift ever: a British-made poacher's spade. I never use a bigger shovel anymore. If I were a new gardener, I would want a pair of Felco pruners.”