The root-lesion nematodes found in uncultivated soils, mainly in natural grasslands in Japan

Abstract

Gotoh (1969) reported genera of plant-parasitic nematode found in uncultivated soils through out Japan. In the present paper, Pratylenchus specimens of above-mentioned collection were examined. Species found in such habitat are as follows: Pratylenchus penetrans, P. crenatus, P. neglectus, P. zeae, P. coffeae, P. vulnus, P. loosi, P. sp. 3, P. sp. 4 and P. sp. 5. P. neglectus, P. coffeae, P. vulnus, and P. loosi were considered to originate in arable lands or cultivated plants according to collection data. P. penetrans, P. zeae, P. sp. 3 and P. sp. 4 may be native in uncultivated lands. P. sp. 3, which closely resemblesd P. neglectus but differed from the latter in the shape of lip and stylet-knobs, was frequently found associated with graminaceous and other plants of uncultivated lands in Honshu and Kyushu. P. sp.4 was extracted from soils of various vegetations on tops and foot of Kudju-Mountains (700 and 1, 400-1, 660 m high). P. zeae, distributed in arable lands of Honshu and Kyu-shu, was found from uncultivated soils of the districts, too. It is to be noted that the nematode was extracted from soil around roots of azalea tree on the top of Mt. MyOken (1, 330 m high), Unzen-Mountains.