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Variety of nematode community indices have been proposed for purposes of environmental monitoring. During three phases of surveys (2005-08), thirty nine nematode genera other than root-knot nematodes were found associated with rice crop plants while 33 from soybean in the surveyed areas of rice and soybean. Nematodes were placed into five different groups (Yeates et al., 1993) viz., herbivores, fungivores, bacteriovores, omnivores and predators. In the present study highly abundant group is herbivores, followed by bacteriovores, fungivores, predators, and omnivores were encountered from rice and soybean fields. The occurrence percentage was observed in per 500 g soil for each nematode genus. All species of nematodes associated with soybean are first records of nematodes associated with soybean from Pakistan. Nematode communities were analyzed by mean abundance, prominence value, importance value and cluster analysis based on nematode numbers and presence or absence of nematode, respectively. Community relationship revealed the overall dominance of herbivores (Hirschmanniella and Helicotylenchus) and fungivores (Aphelenchoides) in rice and Tylenchorhynchus (herbivores), Aphelenchoides (fungivores), Panagrolaimus and Acrobelus (becteriovores) from soybean in all terms of community analysis. While the UPGMA cluster analysis showed that Multan and Dir localities exhibit close similarity coefficient in soybean and in rice Thatta and Sawat showed more similar coefficient or the nematode incidence

COMMUNITY ANALYSIS OF PLANT PARASITIC AND FREE LIVING NEMATODES ASSOCIATED WITH RICE AND SOYBEAN PLANTATION FROM PAKISTAN