False is correct! An American elm that shows some tolerance to Dutch elm disease (DED) was introduced in recent years - - American Liberty elm. It has an upright vase shape and vigorous growth habit. Valley Forge and New Harmon
y are two new, DED tolerant American elm cultivars that will be available in the retail market in the near future.
In the search to find elms that were DED resistant, researchers found that crosses between various Asiatic elms and the American elms showed good DED resistance. However, these hybrids do not have the impressive growth and form of the American elm.
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