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    Climbers' CornerTree Academy

    Turning Yellow Trees Green


    Trees can become chlorotic when they lack certain nutrients and cannot produce enough chlorophyll. Over time this stress leads to decline, and they become susceptible to other problems. These nutrient deficiencies develop from site and environmental problems. For example, some micronutrients are deficient because elevated soil pH makes these nutrients unavailable. To manage the problem it is necessary to identify the proper cause. Attendees will learn to diagnosis the cause of the chlorosis and learn how to use cultural practices to correct them. Recently we have conducted research to evaluate different trunk injection and soil treatment techniques to apply micronutrients and make them available to the tree. These results will be shared.


    Leonard F. Burkhart, Jr. Ph.D., is a horticulturist for The Davey Tree Expert Company in in the Western United States and Western Canada. His responsibilities include arboricultural and horticultural consulting, research, and science advising.

    Climbers' CornerTree Academy

    ©International Society of Arboriculture 2009-2018
    PO Box 3129 • Champaign, IL 61826, USA • +1.217.355.9411

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