pine moth larva
Specifically refers to the larva of Dendrolimus spectabilis, a pest of pine trees.
The pine moth larvae ate up all the pine needles.
Katakana spelling is common for this organism name; usually written in kana.
Kanji form is rare; the word is usually written in kana.
Compound of 松 (matsu, 'pine') + 毛虫 (kemushi, 'caterpillar'), literally 'pine caterpillar'.