1Department of Nematology, Assam Agricultural University, Jorhat, (Assam)-785 013, India
Regional Agricultural Research Station, Assam Agricultural University, North Lakhimpur, (Assam)-787 032, India
*E-mail: debanand2009@rediffmail.com
Online published on 12 April, 2012.
Investigation was carried out at Regional Agricultural Research Station, North Lakhimpur, Assam for the management of ufra disease in deep water rice (var. Rangabao) under field condition. Seed dressing with carbosulfan 25 STD @ 3%(w/w) plus foliar application of carbosulfan 25EC @ 0.02% at 40 days after sowing and at panicle initiation stage significantly reduced ufra infestation and subsequently increased yield. Ufra nematode, Ditylenchus angustus took 25–30 days to complete its life cycle (juvenile to juvenile) under laboratory condition. D. angustus survived in seed during off season and its population in stubbles decreased with increasing time.
Ufra disease, cabosulfan, life cycle, survival, Ditylenchus angustus, deep water rice
