Litylenchus crenatae mccannii(LITYMC)
Distribution details in Canada
Current pest situation evaluated by EPPO on the basis of information dated
2019: Present, restricted distribution
EPPO Reporting Service (2019/083) : it is suspected that the emerging 'Beech Leaf Disease' observed in parts of North America might be associated with Litylenchus crenatae, but this remains to be confirmed.
EPPO Reporting Service (2020/082) : Nematode populations collected in Ohio (initially identified as L. crenatae), Pennsylvania and Ontario were further studied. Results showed that North American nematode populations differed in morphology, host range, and ribosomal DNA marker from those in Japan. Therefore, it was proposed to consider the North American nematode associated with beech leaf disease as a new subspecies of L. crenatae, and to call it: Litylenchus crenatae mccannii.
EPPO Reporting Service (2021/067) : further studies supporting the involvement of L. crenatae mccannii in beech leaf disease.
EPPO Reporting Service (2020/082) : Nematode populations collected in Ohio (initially identified as L. crenatae), Pennsylvania and Ontario were further studied. Results showed that North American nematode populations differed in morphology, host range, and ribosomal DNA marker from those in Japan. Therefore, it was proposed to consider the North American nematode associated with beech leaf disease as a new subspecies of L. crenatae, and to call it: Litylenchus crenatae mccannii.
EPPO Reporting Service (2021/067) : further studies supporting the involvement of L. crenatae mccannii in beech leaf disease.
* Carta LK, Handoo ZA, Li S, Kantor M, Bauchan G, McCann D, Gabriel CK, Yu Q, Reed S, Koch J, Martin D, Burke DJ (2020) Beech leaf disease symptoms caused by newly recognized nematode subspecies Litylenchus crenatae mccannii (Anguinata) described from Fagus grandifolia in North America. Forest Pathology, e12580. https://doi.org/10.1111/efp.12580
* Ewing CJ, Hausman CE, Pogacnik J, Slot J, Bonello P (2018) Beech leaf disease: an emerging forest epidemic. Forest Pathology e12488. DOI: 10.1111/efp.12488
* Reed SE, Greifenhagen S, Yu Q, Hoke A, Burke DJ, Carta LK, Handoo ZA, Kantor MR, Koch J (2020) Foliar nematode, Litylenchus crenatae ssp. mccannii, population dynamics in leaves and buds of beech leaf disease-affected trees in Canada and the US. Forest Pathology 50, e12599.
* Ewing CJ, Hausman CE, Pogacnik J, Slot J, Bonello P (2018) Beech leaf disease: an emerging forest epidemic. Forest Pathology e12488. DOI: 10.1111/efp.12488
* Reed SE, Greifenhagen S, Yu Q, Hoke A, Burke DJ, Carta LK, Handoo ZA, Kantor MR, Koch J (2020) Foliar nematode, Litylenchus crenatae ssp. mccannii, population dynamics in leaves and buds of beech leaf disease-affected trees in Canada and the US. Forest Pathology 50, e12599.
| Country | State | Status | |
|---|---|---|---|
| United States of America | New Hampshire | Present, restricted distribution | |
| United States of America | Massachusetts | Present, restricted distribution | |
| United States of America | Connecticut | Present, restricted distribution | |
| United States of America | New York | Present, restricted distribution | |
| United States of America | Ohio | Present, restricted distribution | |
| United States of America | Pennsylvania | Present, restricted distribution | |
| United States of America | Maine | Present, restricted distribution | |
| United States of America | New Jersey | Present, no details | |
| United States of America | West Virginia | Present, no details | |
| United States of America | Virginia | Present, no details | |
| United States of America | Rhode Island | Present, widespread | |
| United States of America | Michigan | Present, restricted distribution | |
| United States of America | Maryland | Present, no details | |
| United States of America | Present, restricted distribution |