occurrence and distribution of entomopathogenic nematodes in soils of jorhat district of assam, india

Research Article
Bora. N, Borgohain. N Gogoi. B.B, Das. D and Sharmah. D*
DOI: 
xxx-xxxx-xxx
Subject: 
science
KeyWords: 
EPN, Survey, Steinernema, Heterorhbditis, Frequency, Agricultural Crops.
Abstract: 

A two years random roving survey was conducted for occurrence and crop wise distribution pattern of Entomopathogenic Nematode (EPN) in Jorhat district of Assam under the Depertment of Nematology, Assam Agricultural University, Jorhat during 2011-2012. A total of 120 soil samples were collected from all 5 blocks of the district Jorhat of which 45 samples were found EPN positive. The percent occurrence of Steinernema and Heterorhabditis were 19.73% and 19.72% respectively. The maximum frequency of occurrence (35%) was recorded from Baghchung block and minimum (15 %) from both in Dhekorgorah and Titabar blocks. In crop wise distribution pattern, maximum frequency was observed in fruit crops (35%) followed by ornamental crop (25%), plantation crops (20%) and field crops (20%).