Choo H Y, Kaya H K, Shea P, Noffsinger E M
J Nematol. 1987 Oct;19(4):495-502.
Nematodes found in Ips paraconfusus from ponderosa pine in California were an undescribed species of Parasitaphelenchus, Contortylenchus elongatus, C. reversus, and C. brevicomi. C. elongatus, the most commonly found contortylenchid, was present in 98.2% of the contortylenchid-parasitized beetles. Only one nematode parasite of the gut, a Parasitorhabditis sp., was isolated. Although significant differences in parasitism were observed, they were by collection sites, rather than by elevation or bole sources (slash or standing). Significant changes in parasitism between fall and spring collections were observed but not at every site. Nematode parasitism in the F generation of I. paraconfusus by Parasitaphelenchus, Contortylenchus, or Parasitorhabditis increased or decreased from the parent generation depending upon the experiment.Nematode parasites from I. pini included an undescribed Parasitaphelenchus sp., two undescribed Contortylenchus spp., C. reversus and Parasitylenchus (= Neoparasitylenchus) ovarius from the hemocel, and Parasitorhabditis ipini from the gut. Parasitaphelenchus sp. was found in 99% and 45.3% of the beetles from Idaho and California, respectively. Of the 1,000 I. pini from Idaho and California, 157 were parasitized by the contortylenchid species or P. ovarius.
在加利福尼亚州黄松中发现的混淆材小蠹（Ips paraconfusus）体内的线虫包括一种未描述的拟寄生滑刃线虫属（Parasitaphelenchus）、长扭尾垫刃线虫（Contortylenchus elongatus）、反向扭尾垫刃线虫（C. reversus）和短尾扭尾垫刃线虫（C. brevicomi）。长扭尾垫刃线虫是最常见的扭尾垫刃线虫，在98.2%的被扭尾垫刃线虫寄生的甲虫中存在。仅分离出一种肠道线虫寄生虫，即一种寄生杆线虫属（Parasitorhabditis）的线虫。尽管观察到寄生情况存在显著差异，但这些差异是由采集地点导致的，而非海拔或树干来源（伐倒木或立木）。秋季和春季采集之间观察到寄生情况有显著变化，但并非在每个地点都如此。根据实验不同，拟寄生滑刃线虫属、扭尾垫刃线虫属或寄生杆线虫属对混淆材小蠹F代的线虫寄生情况相对于亲代有所增加或减少。松材小蠹（I. pini）体内的线虫寄生虫包括一种未描述的拟寄生滑刃线虫属线虫、两种未描述的扭尾垫刃线虫属线虫、反向扭尾垫刃线虫以及来自血腔的卵巢寄生伞滑刃线虫（Parasitylenchus (= Neoparasitylenchus) ovarius），还有来自肠道的松树寄生杆线虫（Parasitorhabditis ipini）。拟寄生滑刃线虫属线虫分别在99%和45.3%的爱达荷州和加利福尼亚州的甲虫中被发现。在来自爱达荷州和加利福尼亚州的1000只松材小蠹中，有157只被扭尾垫刃线虫属线虫或卵巢寄生伞滑刃线虫寄生。
