Abstract
Informationon the biology, distribution, host-parasite relationship and economic impact of plant-parasitic nematodes reported in Utah and Nevada during the past 100 years is reviewed. Special emphasis is given to problems caused by nematode parasites of above ground plant parts (Anguina agrostis, A. tritici, Mesoanguina balsamophila and Ditylenchus dipsaci) and roots (Heterodera avenae, H. schachtii, Meloidogyne chitwoodi, M. hapla, Pratylenchus neglectus, P. thornei, P. vulnus and Xiphinema americanum). Biological and morphological information about three nematode parasites of some trees and shrubs found in the natural environment in Utah (Bellodera utahensis, Nacobbus aberrans and Sphaeronema rumicis) is also included. Appropriate management practices of the species that damage cereals, forage legumes, grasses, potatoes and sugar beet are discussed.