1904: Gypsy moth arrives in Connecticut and brings with it a greater demand for tree care professionals.

1907: Chestnut blight fungus is collected in Connecticut for the first time and within five years it sweeps throughout the state, all but eliminating American chestnut from the forest.

1919: Cornelius A. Millane persuades the legislature to pass a licensing law for tree workers called "The Expert Law".

1919: The Connecticut Tree Protection Examining Board is formed; Mr. Millane is the first to take and pass the test and is issued Certificate #1.

1919: The first institute for educating tree workers is held at The Connecticut Agricultural Experiment Station.

History 1920-1939
History 1940-1959
History 1960-1980
History 1980-2004
History 2005-Present