Mesostigmatid Mites Associated with Japanese Pine Sawyer Beetle

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  • マツノマダラカミキリの蛹室および成虫から検出される中気門類ダニ
  • マツノマダラカミキリ ノ ヨウシツ オヨビ セイチュウ カラ ケンシュツサレル

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Abstract

Three species of mesostigmatid mites, Dendrolaelaps fukikoae, D. unispinatus and Proctolaelaps hystrix, coexisted in the pupal chambers of Japanese pine sawyer beetle, Monochamus alternatus, which had been formed in the pine trees infected with the pine wood nematode, Bursaphelenchus lignicolus. Frequency of detection and population of D. fukikoae was highest among them. Deutonymphs of all species were carried by the emerging sawyer beetles with the nematodes. They showed no preference for either sex of the beetle, but each species preferred to ride on specific parts of the beetle's body. The former two species were nematode-feeders, but there was no high correlation between numbers of phoretic mites and the nematodes. Majority of the mites were detached from the beetle's body two weeks after its maturation feeding. The three species were distributed over almost all of the areas where pine wilt disease had occurred in Japan.

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