Detection Survey of Bursaphelenchus spp. Nematodes in Dead Pinus luchuensis Mayr Trees and Monochamus alternatus Hope in Miyako-jima Island, Okinawa Prefecture.

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  • 沖縄県宮古島のリュウキュウマツ枯死木およびマツノマダラカミキリからのＢｕｒｓａｐｈｅｌｅｎｃｈｕｓ属線虫検出調査
  • オキナワケン ミヤコジマ ノ リュウキュウマツ コシ ボク オヨビ マツノマダラカミキリ カラ ノ Bursaphelenchusゾク センチュウ ケンシュツ チョウサ

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We investigated the occurrence of Bursaphelenchus xylophilus in wood samples derived from Pinus luchuensis trees that had recently died as well as from the adult Monochamus alternatus that emerged from those trees to determine if the pine mass mortality found on Miyako-jima Island, Okinawa Prefecture, is related to pine wilt disease. No Burusaphelenchus xylophilus was detected in any of the 796 wood samples collected at the 6 locations from 2002 to 2004, nor in 115 of the newly emerged adult M. alternatus, suggesting that B. xylophilus is not the causal agent of recent mass mortality of P. luchuensis on Miyako-jima Island. Bursaphelencus mucronatus, a closely related species of B. xylophilus, was detected in the wood samples collected at sites in the south-western part of Miyako-jima. This is the first recorded instance of B. mucronatus in Okinawa Prefecture.

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