Abstract

• A total of 17 species of plant-parasitic nematodes belongs to 15 genera, 11 families and two orders were recorded in soil and root samples at different monsoon rice fields from Banmaw environs. In two orders, the total percent of genera (73.33%) in order Tylenchida was higher than in the order Aphelenchida (26.67%). In soil samples, the highest individual population of plant-parasitic nematodes (2280/100cc soil) was recorded in after harvest sample from rice field III (RF III) and the lowest (7/100cc soil) was in second sample (S II) from rice field I (RF I). All the root samples, the highest (2008/10g root) and lowest (33/10g root) population of plant-parasitic nematodes was recorded in sixth sample (S VI) and fourth sample (S IV) respectively from RF III. Among the recorded plant-parasitic nematodes, three species (Hirschmanniella oryzae, Meloidogyne graminicola, Aphelenchoides besseyi) were the major rice nematodes. In all collected samples, the highest (15246 individuals) and lowest (413 individuals) individual population were observed in H. oryzae and A. besseyi respectively. The highest individual number of major rice nematodes, lowest seed weight and yield were recorded in RF III. The lowest number of nematodes, highest seed weight and yield were observed in RF I.