August 6, 2014: Retrenching and Regenerating Trees: An International Perspective ISA International Conference, Milwaukee WI US
As trees grow large, they no longer fit around urban infrastructure. Roots and branches are often harshly reduced to make room for human activities. Retrenchment pruning is a phased form of crown reduction that retains biomechanical integrity by shedding small branches and developing a lower crown. International pruning standards agree, with some variation, that specifying this work can meet the objective of sustaining the substantial benefits from older trees. Systematic specifications for retrenching the branches and roots of trees with hollows and other perceived hazards have maintained reasonable costs and risks on trees around the world.
May 28, 2014: Detectives do the dirty work: diagnosing and managing the interaction of urban trees with associates, pests, and other humans ISA EUROPEAN CONFERENCE OF ARBORICULTURE Turin, Italy
May 27, 2014: Valuing and managing veteran trees: the VETree Project. ISA EUROPEAN CONFERENCE OF ARBORICULTURE Turin, Italy
May 26, 2014: Retrenching hollow trees for life: fitting smaller and stronger trees into cities. ISA EUROPEAN CONFERENCE OF ARBORICULTURE, Turin, Italy
November 22, 2013: Veteran Tree Care, Montgomery County, Maryland’s Tree Matters Symposium, Silver Springs MD
November 15, 2013, 8 a.m.: Retrenching Hollow Trees for Life, at the Tree Care Industry Association Expo Charlotte NC. Hollowness occurs naturally, as taproots and heartwood are shed. Buttresses and adaptive growth provide needed support. Formulas for tree structure devaluation ignore strengths and dwell on defects. Interior trunk decay is the reason for many tree removals, but trunk failures are rare. We focus on the flare, the forks, and the living tree.
Branch reduction is often avoided because arborists are always told that removal cuts are better for the tree, and heading cuts are bad. But outer branches are naturally shed as trees age, leaving an inner crown. Retrenchment pruning of big hollow trees is responsible risk management, reaching beyond rules of thumb and arborphobic myths.
Even clients with low risk tolerance are willing to retain hollow trees that are conservatively managed. Witness rejuvenation, in retrenched residential and municipal trees. New growth arises from the right places, and the tree lives on. Tomography, Retrenchment, and Hollow Trees
November 5, 2013: “Using the New A300 Root and Soil Standards” at the New England ISA Chapter, Warwick RI
November 4, 2013: Retrenching Hollow Trees for Life at the New England ISA Chapter, Warwick RI
October 23, 2013 Illinois Arborist Association 31st Annual Conference & Trade show. 1:00 pm Diagnosing with Detective Dendro, 2:00pm Standing Taller with Tree Standards. Tinley Park IL
October 4, 2013, Texas Tree conference. Root Management: the A300 Standard meets Florida’s BMP, for Municipal Arborists. 11 a.m. Detective Dendro: PHC Principles and Profits, for Commercial Arborists, Waco TX
July 14, 2013, 10:30 am – 12 pm: Detective Dendro and the Wild Life was a “natural” topic for the National Audubon Society, so we’ll be at their annual meeting at Skamania Lodge in Washington State.
February 15-16, 2013: ISA-Ontario Chapter Annual Conference February 15, 2013: Aerial Assessment & The Migratory Bird Convention & Endangered Species Act. How to comply, plus comparing and contrasting with other countries’ tree/wildlife legislation. February16, 2013: WritingSpecifications and Reports, Detective Fashion, Handout Root Inspections & Treatments Using the ANSI A300 Standard. 150 minutes of root management, by the book.
January 23, 2013, the Idaho Horticultural Exposition in Boise, Wed. Jan. 23rd: “Detective Dendro and the High-Risk Trees,” from 8:00-9:15 am; This talk will offer alternatives to drill-and-kill tree risk assessment. Give trees mitigation, or give trees death! “Restoration Pruning: After the Storm, Head for Better Form,” from 10:25 – 11:30 a.m. Brand new studies from around the world, featuring Idaho species. “Report Writing on Tree Appraisals,” from 4:00-5:00 p.m., from writing the Assignment, to “e-“asy dictation, to revision and completion. Words are powerful tools. With tricks and techniques used by Detective Dendro, you can master the challenge of writing reports!
November 18, 2012 Hong Kong Tree Climbing Championships I was happy to demonstrate the use of the Wraptor motorised ascender, and perform an Aerial Assessment. Mr. Don Picker assisted with translation, and with son Jon did an outstanding job organising the following Summit.
November 19-21, 2012 Hong Kong http://www.ias.hk/ International Arboriculture Summit on Trees: The Mysteries Within I’m honored to be on a program with Frank Rinn and Neville Fay. Monday I presented on The Epicormic to Endocormic–Transition to Stability Tuesday was a practicum on writing specifications for Restoration Pruning Wednesday closed with Detective Dendro and the High-Risk Trees
November 12, 2012 Sacramento, California US, the Society of Municipal Arboriculture, http://www.arborday.org/shopping/pcf/2012/sma.cfm Using A300 Specifications to Mitigate Risk together with Gordon Mann of Mann Made Resources, on the beautiful State Capitol grounds. Using sample forms based on the Tree Care Standard, our group of forty strong wrote specs to manage challenging scenarios. The A300 format literally keeps administrators, staff, and contractors all on the same page!