A field study was-made on the effectiveness the seeding year were increased by 22, 22, ot seven nematicides in reducing root lesion and 40Vo, respectively. Sixteen moirths aftei nematodo (lratylenchus spp.) numbers in soil seeding, significantly more nematod". *".e rLand roots of alfalfa, red clover, and birdsfoot covered from birdsfoot trefoil roots than from trefoil. Each of the nematicides significantly red clover, and more from red clover than reduced the number of nematodes iecovered from alfalia. The recovery of Fusarium spp.from soil 2 and 14 months after seeding, and from rootlets 4 months afier seeding was not from roots 4 and 16 qoq+s after. seeding. affected by nematicide treatments;"h;;;t;r;Nematicide treatments significantly increase? Fusariu.m ipp. were recovered teir'ti"q"""Uv first cut (August) yields of red clover, alfalfa, from birdsfbbt trefoil than from red cloi'veioi and birdsfoot trefoil in the seeding year bv 55. alfalfa rootlets.

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Cet article présente une revue des nematodes phytoparasites qui causent des problèmes au Nouveau-Brunswick, en Nouvelle-Ecosse et à l'île-du Prince-Édouard, ainsi que les approches de lutte utilisées. Le nématode des lésions des racines (Pratylenchus penetrans) est la seule espèce de nématode de la région qui provoque régulièrement des baisses de rendement. Le nématode des nodosités des racines (Meloidogyne hapla) cause occasionnellement des dommages aux carottes (Daucus carota) mais les niveaux de population de ce nématode sont généralement très faibles. Le nématode du kyste du trèfle (Heterodera trifolii) est répandu mais il n'a pas causé de dommages aux récoltes de la région. Les techniques de production utilisées afin de réduire l'impact des nematodes phytoparasites dans les Maritimes, à savoir la rotation des cultures, les traitements nématicides, le renforcement des règlements de quarantaine et les pratiques de labourage, sont discutées. Un service-conseil sur les nematodes est également considéré.This paper presents a review of the plant parasitic nematodes that are of concern in New Brunswick, Nova Scotia, and Prince-Edward-Island, and the approaches used to manage them. The root lesion nematode (Pratylenchus penetrans) is the only nematode species in the region that regularly reduces crop yields. The northern root-knot nematode (Meloidogyne hapla) occasionally causes damage to carrots (Daucus carota), but population levels of this nematode species usually are very low. The clover cyst nematode (Heterodera trifolii) is widespread, but has not caused any damage to crops in the region. Management procedures used to reduce the impact of plant parasitic nematodes in the Maritime provinces, e.g. crop rotations, nematicide treatments, enforcement of quarantine regulations, and tillage practices are discussed. A nematode advisory service is also considered

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