wooly apple aphid
A specific pest of apple trees, Eriosoma lanigerum. The name literally means 'apple cotton insect', referring to the fluffy white wax it produces.
The wooly apple aphid is a pest that attaches white cotton-like substances to apple trees.
Katakana spelling, common in biological contexts or for emphasis.
Kanji spelling is rare and mainly found in older or specialized texts.
Compound of りんご (apple) + わた (cotton) + むし (insect), from the cottony wax it produces.