
EXTERNAL
RESOURCES
Trusted Sources
Ptolemy Strives to provide solutions based on the most recent studies and relevant information by credible sources. We believe in consumer education and offer many resources to our clients directly.

University of Florida IFAS Extension
The University of Florida's Institute of Food and Agricultural Sciences (UF/IFAS) is a federal, state, and county partnership dedicated to developing knowledge in agriculture, human and natural resources, and the life sciences and to making that knowledge accessible to sustain and enhance the quality of human life.

Tree Care Industry Association
The Tree Care Industry Association (TCIA) is a trade association of 2,300 tree care firms and affiliated companies and was established in 1938 as the National Arborist Association
TCIA supports you over the life of your business by providing tools you can use to use every day to improve your safety, sustainability, and chances for success. TCIA not only develops safety and education programs, standards of tree care practice, and management information for tree and landscape firms around the world, we also provide continuing education, training, conferences, and publications to promote the safe and appropriate practice of tree care.


International Society Of Arboriculture
Through research, technology, and education, the International Society of Arboriculture (ISA) promotes the professional practice of arboriculture and fosters a greater worldwide awareness of the benefits of trees.ISA exists so that professionals, allied professionals, public officials, and consumers worldwide recognize the economic, environmental, and societal benefits and values of trees and their care at a cost that demonstrates the wise stewardship of resources.
TreesAreGood.org is an educational website brought to you by ISA providing homeowners and other tree owners with reliable information regarding the benefits of trees and how to properly care for trees in an urban environment.

The International Palm Society
The International Palm Society, Inc. is operated solely and exclusively for scientific and/or educational purposes related to the study of palms, their propagation, culture, conservation, care, and development. This website includes extensive information on palm horticulture, online access to over 50 years of articles published in our journal, Palms (formerly Principes), a gallery of images, links to other sites, links to PalmTalk – the world’s most active online forum on all aspects of palm trees – and much more.

Center Of Invasive Species & Ecosystem Health
Invasive.org is a joint project of University of Georgia - Center for Invasive Species and Ecosystem Health, USDA Animal and Plant Health Inspection Service, USDA Forest Service, USDA Identification Technology Program, and USDA National Institute of Food and Agriculture. Started in 1994, focusing on species of economic concern.

Pest Tracker
This website, created by the National Agricultural Pest Information System, brings together information on more than 500 different exotic pests. You'll find maps of each invader's spread, pictures, descriptions and other information about each exotic pest. It's a great resource for information about all types of exotic pests. The site is a joint effort of Purdue University, USDA's Animal and Plant Health Inspection Service, the National Plant Board, and the Center for Environmental and Regulatory Information Systems.