Wojtowlcz M R, Golden A M, Forer L B, Stouffer R F
J Nematol. 1982 Oct;14(4):511-6.
Though in the past Xiphinema americanum has been the most commonly reported dagger nematode in the eastern United States, our studies revealed the presence in Pennsvlvania of a previously unrecognized and unreported species related to X. americanum, Morphometric data and photomicrographs establish the identity of this form as X. rivesi and show expected variations in populations of this species from various locations. Similar data and illustrations are given for X. americanum populations from Pennsylvania and other areas, showing variations and relationships. Xiphinema rivesi is widely distributed in the fruit producing area of south-central Pennsylvania and is also reported herein from raspberry in Vermont and apple in Maryland and New York. This species is frequently found in fruit growing areas of Pennsylvania associated with tomato ringspot virus-induced diseases and is also found associated with corn, bluegrass sod, and alfalfa.
尽管过去美洲剑线虫一直是美国东部报道最为常见的剑线虫，但我们的研究表明，宾夕法尼亚州存在一种此前未被识别和报道过的、与美洲剑线虫相关的物种。形态测量数据和显微照片确定了这种形态为里氏剑线虫，并显示了该物种不同种群在不同地点的预期变异情况。文中还给出了宾夕法尼亚州及其他地区美洲剑线虫种群的类似数据和图示，展示了其变异情况及相互关系。里氏剑线虫广泛分布于宾夕法尼亚州中南部的水果产区，本文还报道了其在佛蒙特州的树莓以及马里兰州和纽约州的苹果上出现。该物种在宾夕法尼亚州的水果种植区经常与番茄环斑病毒引起的病害有关，也见于玉米、早熟禾草皮和苜蓿上。
