Diversity and Abundance of Bacterivore and Fungivore nematodes in Mango Orchards of Dehradun (Uttarakhand), India

Soil analysis of mango orchards of Dehradun yielded 26 genera of bacterivore and fungivore nematodes. Bacterivore nematodes were dominant group comprising 80.76% while, fungivore comprised 19.23%. In terms of taxonomic diversity among the 26 genera identified, 51% belonged to order Rhabditida comprising 13 genera, followed by Araeolaimida (19.2%) with 5 genera, Tylenchida (11.5%) with 3 genera, Aphelenchida (7.6%) with 2 genera and the orders Chromadorida, Monhysterida and Alaimida comprising 3.8% each with one genus each. The diversity indices such as the Shannon-Weaver and Inverse Simpson showed that this site has a high nematode diversity of 2.78 and 12.7 respectively. Nematode Channel Ration (NCR) showed 0.862 which shows that bacterial decomposition pathway is dominant in the area.