P-430 - AN UPDATE OF REGULATED AND RECENT DISCOVERIES OF INVASIVE ALIEN PLANT-PARASITIC NEMATODES SPECIES IN CANADA.

With the most recent discovery of the invasive alien nematode species Litylenchus crenatae ssp. mccannii in Ontario, Canada, the etiological agent causing beech leaf disease, and the 2006 report of Globodera rostochiensis from potato in the Saint-Amable region, Quebec, it is time to provide updated information on the Canada-regulated nematode pests, and recent discoveries of invasive alien nematode species in Canada. Since 2012, the stem and bulb nematode Ditylenchus dipsaci has caused epidemic disease on garlic in Ontario and it was subsequently found in neighboring provinces. Around that time, Ditylenchus destructor was also discovered on garlic in Ontario. Ditylenchus weischeri was identified in yellow peas in the Prairie provinces not Ditylenchus dipsaci as first thought. In 2013, the soybean cyst nematode Heterodera glycines was deregulated. Other recently discovered invasive alien plant parasitic nematode species are: Heterodera carotae, Meloidogyne naasi, Pratylenchus alleni, Pratylenchus thornei, Trichodorus primitivus , Xiphinema chambersi. The current updated list of regulated nematodes in Canada includes: Ditylenchus dipsaci, Ditylenchus destructor, Globodera pallida, Globodera rostochiensis, Longidorus spp. (virus vector), Meloidogyne chitwoodi, Trichodorus spp. (virus vector), and Xiphinema spp. (virus vector).