Morphological Comparisons Between Xiphinema rivesi Daimasso and X. americanum Cobb Populations from the Eastern United States
Wojtowlcz, M.R.; Golden, A.M.; Forer, L.B.; Stouffer, R.F.
Journal of Nematology 14(4): 511-516
1982
ISSN/ISBN: 0022-300X PMID: 19295745 Document Number: 196349
Though in the past X. americanum was the most commonly reported dagger nematode in the eastern USA, studies revealed the presence in Pennsylvania 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. X. rivesi is widely distributed in the fruit producing area of southcentral Pennsylvania and is also reported 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.