Transmission of the Pine Wood Nematode, Bursaphelenchus xylophilus (STEINER et BUHRER) NICKLE (Nematoda: Aphelenchoididae), by the Japanese Pine Sawyer, Monochamus alternatus HOPE (Coleoptera: Cerambycidae), to Pine Twigs under Laboratory Co

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The pine wood nematode, Bursaphelenchus xylophilus, is the causal agent of pine wilt disease of Japanese black pine, Pinus thunbergii and Japanese red pine, P. densiflora. The number of nematodes successfully carried by adult of the Japanese pine sawyer, Monochamus alternatus, from dead pine trees and the temporal pattern of nematode transmission to the pine twigs were examined. All adult beetles of Nara population carried nematodes when they emerged from the tree in which they developed; 94.7% for Mie population. Mean numbers of nematodes carried by a beetle of the Nara and Mie population were 1, 300 and 1, 203, respectively. Transmission pattern of nematodes from adult beetle to pine twigs in Nara and Mie had a peak transmission two and five weeks after adult emergence, respectively. The main factors affecting the number of nematodes transmitted were the number of nematodes carried by adult beetles and the longevity of the pine sawyer beetle. Jpn. J. Nematol. 18: 6-14 (1989).
日本線虫学会の論文