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History of ISA: 1960s
International Shade Tree Conference
The 1960s was a decade of change throughout the world, and the
National Shade Tree Conference underwent significant transitions as well. In
1960, Canadian members petitioned the NSTC to change its name from National to
International. A substantial number of Canadians felt misrepresented by the
term national. Accordingly, the organization became the International Shade
Tree Conference (ISTC) in 1961.

Opening ceremony, San Francisco, 1962.

Shh! A Whisper Chipper!
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In 1963, the Conference created awards to recognize the service of
its members. The Author’s Citation was granted to authors for sustained
excellence in the publication of timely information pertaining to the field of
arboriculture. The Award of Merit was designed to recognize meritorious service
in advancing the principles, ideals, and practices of arboriculture, and is the
highest award made by the Society
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| By 1964, it had become apparent that new action had to be initiated for the
future of the ISTC because the heavy burden of work and responsibility for ISTC
could no longer be continued on a part-time basis. In recognition of his
contributions, the Conference changed Lewis Chadwick’s official status in 1966
from secretary-treasurer to executive director.
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Rotomist sprayer demonstration at an ISTC conference field day.
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Right-of-way spraying by rail. Utility-related issues became a significant
portionof ISTC conferences in the 1960s.
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Dr. Paul E. Tilford retired as editor in 1967 after 30 years of
service. Noel B. Wysong of River Forest, Illinois, served in that capacity for
the next two years. Chadwick retired as executive director in 1969 to an
emeritus status. The Executive Committee then appointed Dr. Eugene B. Himelick
as an unpaid executive director and Ervin C. (Cal) Bundy as full-time executive
secretary. Because both resided in Urbana, Illinois, the official office was
moved from Chadwick’s home in Columbus, Ohio.
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| As the new executive director, Himelick served as liaison between the ISTC
Executive Committee and the executive secretary, with authority to delegate
responsibilities to the secretary as needed to oversee and direct the functions
of the Conference. He also served as chairman of the program committee for the
annual conference. As executive secretary, Bundy was responsible for the
overall management of the organization.
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Every commercial firm needs one of these! Washington, D.C., 1965.
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Activities at the 1966 conference held in Cleveland, Ohio.
"English Elm" planted about 1850, one of the few trees left of a group lining
the early streets of the "forest city."
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The origin and development of special interest groups, such as
utility, commercial, and municipal arborists, began with discussion sessions at
conferences in the 1950s and 1960s. Beginning in 1969, these groups were
granted a recognized status as special interest organizations within the
Conference. A new article of the Constitution in 1969 provided for “associated
special interest groups” within the Conference. The term special interest group
would later be changed to professional affiliation.
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ISTC used buses to transport delegates to the field day in Philadelphia, 1967.
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Eugene B. Himelick
Executive Director - 1969-1979
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Professional Affiliations
The origin and development of special interest groups, such as
utility, commercial, and municipal arborists, began with discussion sessions at
conferences in the 1950s and 1960s. Beginning in 1969, these groups were
granted a recognized status as special interest organizations within the
Conference. A new article of the Constitution in 1969 provided for “associated
special interest groups” within the Conference. The term special interest group
would later be changed to professional affiliation.
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