PATHOTYPES OF THE PINEWOOD NEMATODE BURSAPHELENCHUS-XYLOPHILUS

  • 1 April 1986
    • journal article
    • research article
    • Vol. 18  (2) , 230-238
Abstract
An isolate of Bursaphelenchus xylophilus from Pinus sylvestris in Missouri infected and reproduced in 2-3-year-old seedlings of P. sylvestris and to some extent in seedlings of P. nigra Wilting, however, occurred only in P. sylvestris. B. xylophilus isolated from P. strobus in Vermont infected and reproduced only in P. strobus seedlings. P. taeda seedlings were resistant to both of these isolates. Phytotoxin production was seen only in susceptible seedling species-nematode combinations. Significant water loss occurred only in those seedlings that were wilted because of infection by a comparable nematode isolate. Our results suggest that these isolates are pathotypes of B. xylophilus.