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Image Number K7314-2

In the 1990s and 2000s, breeding and selection at the U.S. National Arboretum leads to the introduction of 10 elm cultivars resistant to Dutch elm disease, which nearly wiped out the entire U.S. elm tree population in the 1940s. Scientists also introduce six red maple cultivars with symmetrical forms, long-lasting fall color, and insect tolerance.


Photo by Scott Bauer.

640 pixels wide: (k7314-2.jpg)

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