Vol. 11, Special Issue 7 (2022)

Author(s):
Vishnuvardhan Reddy K, R Ranjith and P Manikandan

Abstract:
Field incidence of Brown Plant Hopper (BPH) and entomopathogenic fungi of BPH were studied during Samba and Navarai seasons for two consequent years 2013-2015 in coastal saline soil at agriculture main farm, Annamalai University, Annamalainagar, Tamil Nadu, India. The peak BPH incidence during third week of November and the least number of N. lugens was recorded on second week of October 2013. The maximum number of fungal infested cadaver was recorded during third week of November and the least number of cadaver were recorded on third week of October 2013 during the Samba season. During Navarai season the maximum numbers of N. lugens incidence were recorded during second week of February and the least numbers of N. lugens was recorded during fourth week of March. The maximum number of cadaver was recorded during second week of February and the least number of cadaver was recorded during the first week of January. The relative humidity and rainfall showed significant positive correlation, while maximum temperature and minimum temperature exhibited negative correlation with BPH incidence. The entomopathogenic fungi incidence negatively correlated maximum temperature, minimum temperature whereas positively correlated with humidity and rainfall.