October 10th & 11th  |  9:00 AM — 3:00 PM  |  Long Beach Convention Center

Wednesday, October 10th: 8:00 - 9:30 AM

Top Ten Abiotic Disorders Impacting Landscape Trees
by Janet Hartin
CEUs applied for: APLD, DPR, IA, ISA, NALP, PGMS, QWEL

Did you know that between 80 - 90% of plant disorders are the result of irrigation related issues rather than from plant diseases or insects? Even during the drought many landscape trees and shrubs are overwatered leading to a lack of oxygen in the root zone which can kill a plant. In other cases, overwatering leads to the infection of roots and crown by plant pathogens such as Phytophthora or Cytospora spp. Other non-pathogenic disorders (called abiotic disorders) are the result of too little water after transplanting, herbicide drift from neighboring sites, lack of light, lack of air circulation around mature plantings, or construction damage too close to plant roots. Janet Hartin will discuss how to identify and prevent these important issues during her talk.

TLE seminars are "more advanced than typical conference seminars."
- Adolfo Villanueva, CAM Services

Janet Hartin
University of California Cooperative Extension

Janet Hartin is a nationally and internationally recognized environmental horticulturist who has conducted research and education as a University of California Cooperative Extension Horticulturist in Southern California for 34 years. She specializes in sustainable, drought-tolerant landscapes that include both non-native and native species. She has presented over 2,000 talks, workshops, and classes to both commercial and novice audiences. She is the Environmental Horticulture Program Team Leader Associate Editor for Environmental Horticulture for the University of California Division of Agriculture and Natural Resources. She has also authored many technical and industry-oriented articles appearing in journals and magazines. She recently served as a Principal Investigator and project leader (with Dr. Loren Oki and Dr. Dave Fujino) on a project funded by the California Department of Water Resources that measured the performance of several species of landscape trees and shrubs receiving deficit irrigation at 30 large public and privately-maintained sites in six climate zones throughout California.

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