Comparative study on the host susceptibility of different banana cultivars to plant parasitic nematodes in Malappuram district of Kerala,India

Six cultivars of banana grown widely in Malappuram district of Kerala were evaluated for the diversity of plant parasitic nematodes in their respective rhizosphere. The genotypes evaluated include Nendran, Poovan (Mysore), Njali poovan, Mysore poovan, Chenkadali and Ponnan. The study aims on a comparative analysis of rhizosphere of different banana varieties for the occurrence of plant parasitic nematodes, diversity, frequency of occurrence and to determine the most vulnerable type of banana variety. Cobb’s decanting and sieving method was used to isolate nematodes from soil. Thirty three samples randomly collected from different blocks of Malappuram district are subjected to analysis and a ten species of nematodes were reported. Among the six varieties analysed both Nendran and Mysore Poovan variety seems to be more susceptible to phytoparasitic nematodes. With respect to eight blocks of Malappuram district, Helicotylenchus sp. shows highest prominence value followed by Radopholus similis, reniform nematode and Meloidogyne incognita.