Repeated heavy infestation rarely kills the tree outright, but weakens it, rendering it vulnerable to disease.
This larval stage lasts between two and three weeks, at the end of which larvae migrate to the lower part of the trees in search of bark crevices in which to pupate.
The female can lay about 800 ova, but this ovipositing may be interrupted by shortening of the photoperiod to less than 14 hours, inducing a brief feeding bout before the search for a hibernation site.
[6] When X. luteola oviposits, U. minor releases plant volatiles which recruit the egg parasitoid Oomyzus gallerucae.
Gravid X. luteola females also respond, but inversely: They are attracted to volatiles indicating undamaged and/or unoviposited Ulmus material.
[8] In North America, there are few natural enemies, but in Europe, the larva of the beetle are often heavily predated by the chalcidoid wasp Oomyzus gallerucae.
However, tree trunks banded with insecticides can limit repetition the following year by killing the larvae as they descend before hibernation.
[10] Nearly all chemicals currently used commercially in Australia to treat Elm Leaf Beetle, regardless of brand name or delivery method, are neonicotinoid insecticides.