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EXTRACTION, FECUNDITY, AND HOSTS OF CRICONEMELLA RUSTICA BY J. L. TOWNSHEND and T. R. DAVIDSON Agriculture Canada, Research Station, Vineland Station, Ontario L0R 2E0 The centrifugal flotation method, using a 200-mesh (75 µm opening) or finer sieve, a sugar flotation medium (sp. gr. 1.18) and a horizontal rotor, produced maximum extraction of ring nematode, Criconemella rustica (Micoletzky), from soil. Females of C. rustica deposited up to 18 eggs, and hatch occurred in 14-21 days. Rice cutgrass, orchard-grass and bottle-brush grass were the best of 39 hosts of M. rustica. Keywords: nematode extraction, egg-laying, wild and cultivated hosts, nematode biology, hostplants, ring nematode, grass hosts. The ring nematode, Criconemella rustica (Micoletzky) occurs in 10 °?o of the forage fields in the province of Ontario and increases to 69 % in the provinces of Quebec and New Brunswick (Potter & Townshend, 1973; Townshend et al., 1973). This nematode is one of 29 species associated with forage crops in eastern Canada (Willis et al., 1976). Host status of selected weeds, grasses, forages, and other plants has been determined for Pratylenchus penetrans Cobb by Townshend & Davidson, 1960; P. neglectus (Rensch) by Townshend et al., 1973; Helicotylenchus digonicus Perry by Townshend et
Nematologica – Brill
Published: Jan 1, 1989
Keywords: grass hosts; nematode biology; wild and cultivated hosts; nematode extraction; ring nematode; hostplants; egg-laying
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