Pests and Diseases
The tree has considerable variability in resistance to Dutch elm disease. Moreover, like many other elms in North America, it is highly susceptible to damage from many insects and parasites, including the elm leaf beetle Xanthogaleruca luteola, powdery mildew, cankers, aphids, and leaf spot. In the Netherlands U. pumila was also found to be susceptible to coral spot fungus Nectria cinnabarina, while in Italy, the species was also found to have a slight to moderate susceptibility to Elm Yellows. However, U. pumila is the most resistant of all the elms to verticillium wilt.
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