Abstract
The morphological characteristics of dauer juveniles were examined forBursaphelenchusxylophilus,B. firmaeandB. mucronatus kolymensis. Dauer juveniles ofB. xylophilusandB. firmaewere collected directly from their carrier insects,Monochamus alternatusandM. grandis, respectively.Bursaphelenchs m. kolymensisdauer juveniles were induced experimentally usingM. alternatuspupae. The dauer juveniles of these three species were distinguished according to their respective body shapes.Bursaphelenchus xylophiluswas relatively slender compared to the other species. The position of the excretory pore was anterior to the median bulb inB. firmae, overlapping with the median bulb inB. xylophilus, and posterior to, or overlapping with, the posterior part of the median bulb inB. m. kolymensis. The tail tip ofB. firmaewas conical, that ofB. xylophiluscontained a short projection, while inB. m. kolymensisthe tail tip was blunt with a thick mucron.
Published Version
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