How does the host specificity of the Elm Woolly Aphid differ from *Eriosoma lanigerum*?
Answer
The Elm Woolly Aphid is found specifically on elms
Although both the Woolly Apple Aphid and the Elm Woolly Aphid belong to the same subfamily, Eriosomatinae, their host specificity defines where they are found. *Eriosoma lanigerum* is overwhelmingly associated with the *Malus* genus (apples). In contrast, the Elm Woolly Aphid is a distinct species whose habitat is restricted specifically to elms. This distinction is vital for correct identification and management planning; scouting for *E. lanigerum* in an elm tree would likely be fruitless, just as looking for elm-specific pests in an apple orchard misses the primary target. Both demonstrate high fidelity to their respective tree genera.
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