Trichodorids constitute a group of nematodes, together with tylenchs and longidorids, that are parasitic on plants. The trichodorids form the smallest group in a number of genera, species and also individuals in the soil. However, they are not at all devoid of interest on both economical and zoological grounds, and they are being studied with increasing attention by agronomists and taxonomists. Trichodorids are important in strictly agronomical research, as they are able to cause direct damage to the root system of various crops; they are the agent of the 'docking disorder' of the sugar beet, a severe disease in Europe. They are also able to transmit various viruses to a series of important crops. These viruses differ from those transmitted by the longidorids and also - as opposed to longidorids - they are not strictly associated with one or a restricted number of species. Trichodorids therefore constitute a potentially active group of direct and indirect predators.The present book has been written by one of the leading specialists on the group, who has produced an up to date review of data on the morpho-anatomy of all species of the group. Moreover, the book is not, as is so often the case, based merely on a literature survey, but on the author's personal observations. The descriptions are supported by detailed drawings and micrographs and in many instances new characters of taxonomic significance have been identified. Attention to detail and keen observation have enabled the author to provide a considered and authoritative opinion on the taxonomy and systematics of the Trichodoridae. Further, the evaluation and selection of specific characteristics clearly demonstrate the importance of reliable identification of species when undertaking investigations on geographical distribution, ecology and other facets of the biology of individual species, particularly those of economic importance.It is inevitable that in such an actively investigated taxon as the Trichodoridae, there will be a continuing addition of new species which in turn will encourage further expression of taxonomic opinion. If that proves to be so, Dr. Decraemer's book will provide a well-established foundation for any new opinion and will remain a standard reference for Trichodoridae as well as a substantial contribution to the science of nematology. It is intended for research workers and students of agriculture, horticulture and zoology, plant pathologists and extension nematology service.
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