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  1. Tree Identification & Guides | Arbor Day Foundation

    What Tree Is That? is a tree identification guide from the Arbor Day Foundation, featuring an easy-to-use, step-by-step process to identify nearly any tree in North America.

  2. About Trees - Arbor Day Foundation

    Dive into robust resources and helpful tips for tree selection, planting, care, and more.

  3. Ask an Arborist: How Do I Check for Tree Pests?

    Unhealthy trees may result from drought, disease, pests, or improper care. Learn how to identify signs of pests and what to do if your tree is infested.

  4. Tree Health Issues - Arbor Day Foundation

    Tree diseases and pests vary tremendously from region to region, and what’s ailing a tree is often difficult to diagnose. Below you will find some basic information about what may be affecting …

  5. Common Tree Pests and How to Spot Them - Arbor Day Foundation

    May 25, 2018 · The western tent caterpillar attacks a wide range of trees including poplar, willow, cottonwood, quaking aspen and especially fruit trees. A tell-tale sign is their white silken tents …

  6. Tree Care & Maintenance - Arbor Day Foundation

    These comprehensive tree care tips will guide you through the process of selecting, planting, and caring for the right tree for your space.

  7. Tree Guide - Arbor Day Foundation

    Our tree guide offers extensive information on tree height and spread, soil and sunlight needs, leaf characteristics, historical background, wildlife habitat, and much more.

  8. New iPhone App from the Arbor Day Foundation Makes it Easy to …

    Mar 1, 2011 · These illustrations are in precise detail to depict natural colors, shapes and textures, making it easy to identify trees. The What Tree Is That? app offers a user-friendly, unique step …

  9. How to Identify Tree Ailments - Arbor Day Foundation

    Jul 27, 2017 · Untreated trees die within a few years of being infected. Understanding and recognizing the most common tree diseases will help you apply treatment as quickly and …

  10. What Tree Is That — and Why? | Arbor Day Foundation

    This bulletin is about the common trees that are encountered in our communities, how they can be identified, and some of the interactions or ecology that make them a fascinating part of our …