If many zoologists and plant pathologists have given scant attention to the soil-inhabiting and plant-parasitic nematodes, the main reason must be that they are difficult to handle. This is due partly to an awkward size and shape and partly to a marked fragility before mechanical and osmotic forces, so that implements and reagents must be used with care and skill. Hence the appearance in 1949, as the Ministry of Agriculture and Fisheries Technical Bulletin No. 2, of Laboratory Methods for Work with Plant and Soil Nematodes... New editions followed in 1951 and ... 1957, and recently a fourth edition has been published ... This justly reflects the increasing interest in the group now taken by workers in many countries.
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