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Pakistan Journal of Biological Sciences
Year: 2004  |  Volume: 7  |  Issue: 11  |  Page No.: 2002 - 2004

Population Dynamics of Hirschmanniella oryzae in the Rice Root of Farmer Fields as Affected by Edaphic Factors

M.S. Islam, M.U. Ahmad, A.H.M.M. Haque and M.E.H. Sarker    

Abstract: Population dynamics of Hirschmanniella oryzae were determined per 5 g root basis from the roots at different plant growth stages by survey of irrigated rice in Madarganj (Jamalpur district), Madhupur (Tangail district), Sutiakhali, Nilukkhar char and Bangladesh Agricultural University Farm (Mymensingh District) during December 2001-March 2002. The highest nematode population 30.5/5 g root was recorded in BAU Farm having soil pH 5.6 sandy loam texture, 1.88% OM and balanced fertility status followed by a population 24.8/5 g root in Madhupur having soil pH 4.4, loamy texture and 0.99 % OM peak population was observed at soft dough stage covering booting, flowering and milking stage. The reduction in nematode population was recorded from hard dough to mature stage.

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