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Diseased Elms


American Elm Prosperity Program

HISTORY: The Village of East Hampton is the home of 148 majestic Elm trees. These trees had continual canopy dieback that represented the classic flagging of Dutch Elm Disease (DED). They also had mite issues and Anthracnose problems causing the leaves to drop earlier than the other street trees lining the village. Tests were done to determine a plan of action.

DISCOVERIES: The soil media was unable to support these trees and was filled with root feeding nematodes. The soil structure lacked the ability to hold water and nutrients for tree health.


  • We developed a soil mix that would improve and sustain the health of the trees. Beneficial microbes were introduced to combat the existing root feeding nematodes. Additionally, organic matter was blended into this mix to improve the soil’s ability to retain nutrients, water and beneficial soil life.
  • We had this soil analyzed to ensure it would suppress disease. The soil tested well in the suppression of the root borne diseases of Phytophthora and Pythium.

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