First Report of the Stubby-Root Nematode Paratrichodorus teres Associated with Artichoke (Cynara scolymus) in Greece

Plant Disease
E KaranastasiR Neilson

Abstract

The polyphagous stubby-root nematode species, Paratrichodorus teres (Hooper) Siddiqi, was first described from soil under lettuce near Norwich, UK and subsequently reported from South Africa and the United States, but predominantly from temperate regions within Europe (4). P. teres is one of 13 economically important trichodorid species known to be vectors of Tobacco rattle virus (TRV) (4). Artichokes planted during 2000 in a field located in the Kandia area of the Argolis Region, Greece (37°32'N, 22°56'E) exhibited symptoms of a virus infection. Sampling was done to ascertain the presence of Longidorus fasciatus, a vector of artichoke Italian latent nepovirus known to occur in the area (1,4). In addition to L. fasciatus, an unknown trichodorid species and Tylenchorhyncus sp. were recovered from the root zone of artichoke at a number of sites within the field. Measurements and morphological examination of the female (n = 13, body length = 741.7 ± 25.5 μm, onchiostyle = 43.7 ± 0.8 μm, and position of vulva from anterior region relative to total body length V% = 53.8 ± 0.4 μm) and male (n =1, body length = 720.5 μm, onchiostyle = 43.5 μm, spicule length = 51.7 μm, and number of ventromedian precloacal supplements = 3) trichodorid...Continue Reading

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