Pests and Diseases
'Iowa State' was reported in the American Horticulturist News Edition, 63(5):4, 1984, as "a natural selection from southeastern Iowa, highly resistant to Dutch elm disease when inoculated". No other specific information available, but the species is highly susceptible to Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola, and highly preferred for feeding by the Japanese Beetle Popillia japonica in the USA. U. americana is also the most susceptible of all the elms to verticillium wilt.
Read more about this topic: Ulmus Americana 'Iowa State'
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