Survey and Identification of Plant Parasitic Nematodes Associated with Tea Gardens in Dibrugarh District of Assam, India

The present investigation was carried out to determine the occurrence and distribution of plant parasitic nematodes associated with tea plants in different tea gardens in Dibrugarh district. A survey of plant parasitic nematodes revealed that eight genera of plant parasitic nematodes were found to be associated with tea plants in the Dibrugarh district. The genera of plant parasitic nematodes recorded were viz., Helicotylenchus, Hoplolaimus, Tylenchorhynchus, Paratylenchus, Meloidogyne Xiphinema, and also nematode genera found under Tylenchus and Criconematids. Community analysis of plant parasitic nematodes revealed that the genus Helicotylenchus ranked first in relative frequency, absolute frequency, absolute density, relative density, and prominence value. The genus Hoplolaimus ranked second in relative frequency, absolute frequency, absolute density, relative density, and prominence value. Paratylenchus ranked third in relative frequency, absolute frequency, absolute density, relative density, and prominence value.