International Society of Arboriculture

http://www.isa-arbor.com

 

Western Chapter International Society of Arboriculture

http://www.wcisa.net

 

Aesthetic Pruning Association

http://www.aestheticprunersassociation.org

 

Power Point Presentations by Ed Gilman

http://hort.ufl.edu/woody/powerpoints.shtml

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UC Integrated Pest Management 

http://ipm.ucanr.edu/