The dead elms have been replaced by a row of saplings.

枯死的榆已被移去而换栽了一排。

Ivela ochropoda is one of the main defoliator pest occurred in Ulmus pumila, and is very serious in Wuqi County.

要榆毒蛾是榆的食叶害虫之一，在吴起县发严重。