noun
pinewood nematode; pine wilt nematode
Scientific name Bursaphelenchus xylophilus; a parasitic roundworm that causes pine wilt disease. Usually written in katakana.
マツノザイセンチュウは松枯れの原因となる。
The pinewood nematode causes pine wilt.
Refers to the disease (pine wilt) caused by the nematode, not the organism itself.
Compound of 松 (matsu, 'pine'), の (no, possessive particle), 材 (zai, 'timber/lumber'), and 線虫 (senchū, 'nematode'). The name describes a nematode that inhabits pine wood.