As a part of a larger project the phytonematode infestation on Brassica oleracea was looked into to evaluate the density fluctuations of various nematode genera for planning an integrated management for better yield. The host was found infested with Boleodorus, Psilenchus, Helicotylenchus, Merlinius, Aglenchus and Filenchus with varied statistical parameters. The absolute frequency of 93.3% was found in Boleodorus and Helicotylenchus with the lowest frequency of 76.6% in Psilenchus. The population of Boleodorus cylindricus Dhanachand, Renubala & Anandi, 1993 were met with variations in the lengths of body, stylet, oesophagous and tail.