author(s)
K Kiran Kumar and AK Das

abstract
A systemic investigation was conducted on February, 2018 to assess the diversity and community structure of plant parasitic nematodes from the soil rhizosphere of ten different citrus species grown at Citrus Research Station, Tinsukia, Assam. Four major plant parasitic nematode species viz., Tylenchulus semipenetrans, Helicotylenchus dihystera, Hoplolaimus indicus and Tylenchorhynchus spp were found prevalent in the rhizosphere of ten different citrus species. In addition to these, several dorylaimid, rhabditid and predatory nematodes were also encountered. Amongst the plant parasitic nematodes, T. semipenetrans was highly abundant (100%) followed by H. dihystera (80%), Tylenchorhynchus spp. (70%) and H. indicus (50%). Among, different citrus species, a higher population of T. semipenetrans was encountered on rough lemon and least number was encountered on trifoliate orange.