Forest Pathology (2019) 49 (4 - e12534)

Alexander Yu. Ryss, Kristina S. Polyanina, Alexander V. Petrov, Alexander A. Sazonov, Michail Yu. Mandelshtam and Sergei A. Subbotin (2019)
Report of Bursaphelenchus crenati Rühm, 1956 (Nematoda: Parasitaphelenchinae) from Belarus and Russia with a diagnostic key and phylogeny of the Sexdentati group
Forest Pathology 49 (4 - e12534)
Abstract: The endoparasitic nematode, Bursaphelenchus crenati, in beetle tunnels of Hylesinus crenatus from the ash Fraxinus excelsior L. with signs of ash dieback, is recorded for the first time in Central Russia and Belarus. Third-stage dauer juveniles were extracted from the bark beetle, H. crenatus, and cultured on Botrytis cinerea. Morphological, morphometric and molecular analyses of these populations are presented here. Some morphological differences of dauers and adults were found between Belarusian and Russian populations, which may be attributed to seasonal variations. For description of new Bursaphelenchus species, it is recommended to indicate not only the number of lateral incisures but also the number of bands. Recommendations are made to classify the male caudal papillae of Bursaphelenchus into two groups: papilliform and gland papillae with separate numerals. Emended diagnosis, tabular diagnostic polytomous key for the species of Sexdentati group with lists of their vectors and plants, is given. Phylogenetic relationships between some species of the Sexdentati group are also presented based on the analysis of partial 18S, ITS and 28S rRNA gene sequences.
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Database assignments for author(s): Alexander Yuryevich Ryss

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hylesinus crenatus	Ash (Fraxinus)	Belarus
	Hylesinus crenatus	Ash (Fraxinus)	Russia (Eur.)
	Bursaphelenchus crenati	Ash (Fraxinus)	Belarus
	Bursaphelenchus crenati	Ash (Fraxinus)	Russia (Eur.)