The Botany of Pruning featuring Dr. Jim Downer

@ an Online Experience
on Wednesday, June 7, 2023
in This is an online event, CA

Online Registration Closed
To view member pricing please log in.

Non Member


Registration ends ends Jun 07


Or would you prefer to call?
+ 1 866 785 8960

Date and Time:

Wednesday, June 7, 2023 ~ 11:00 am - 12:30  pm

Webinar Description:

Pruning has dramatic impact on tree canopies. Introduced light, disrupting continuity of water in xylem, and changing the path of carbohydrates as well as signaling molecules (phyto-hormones) all cause responses in the remaining unpruned branches leading to growth patterns that may or may not be desired. Pruning also causes wounds that allow entry of decay causing fungi and other kinds of tree pathogens. I will talk about pruning from theses botanical perspectives and how to prune with the least disruption to the tree's physiology.

Instructor Bio:

Dr. Downer has 34 years of experience as a horticulture and plant pathology Advisor with the University of California Cooperative Extension in Ventura County. Dr. Downer’s academic training is from California Polytechnic Univ., Pomona, (BSc. horticulture & botany, 1981; MSc. Biology, 1983;. In 1998 he earned a Ph.D. in plant pathology, from University of California, Riverside. Dr. Downer’s research is focused on mulch, soil microbiology and disease suppression in mulched soils, diseases of shade trees and cultural practices to maintain landscape plants. Dr. Downer is a member of the American Society of Horticultural Science, the American Phytopathological Society, The International Soc. of Arboriculture, and the Western Chapter of the ISA, and the International Society for Horticultural Science. Dr. Downer is an Adjunct professor at California Polytechnic University in Pomona. Dr. Downer serves on the Board of the John Britton Fund for tree Research as the chair of the research advisory committee, and currently chairs the regional conference committee for WCISA. Dr. Downer has a love of shade trees, Shinrin roku (forest bathing/walking) tree work, wood working, horses, gardening, horticulture and the study of plants and their biology.

an Online Experience
Online Event
This is an online event, CA 93257