Biodiversity of species and pest status of some plant parasitic nematodes in Estonia
2000
Krall, E. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Plant Protection)
Of 173 nominal free-living and plant parasitic nematode species listed in Estonia, 15 species or approximately 9 per cent proved to be new for science. Taking into account only 71 fungal feeders and plant parasites, the percentage of new species approximates 13 among them. The nine first described stylet bearing species belong to the genera Anguina, Pratylenchus, Scutylenchus, Heterodera, Globodera, Cactodera, Meloidogyne, and Aphelenchus. The biological diversity in 51 nematode families listed so far is remarkable. A considerable number of species is presented by saprophagus fungal or microbial feeders and predatory way of life occurs in several genera. The most dangerous pathogenic species with a definite pest status belong to cyst nematodes, root-knot nematodes, stem and bulb nematodes and leaf nematodes of the genera Heterodera, Meloidogyne, Ditylenchus, and Aphelenchoides. More information is needed to clarify the pest status of several pathogenic species of Anguina, Pratylenchus, Rotylenchus as well as of virus-transmitting species of Longidorus and Trichodorus
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