Vol. 10, Issue 12 (2021)

Author(s):
K Das, RK Nath, P Sharma, GK Upamanya and R Brahma

Abstract:
A survey was conducted in different farmers field to study the seasonal incidence of gundhi bug, Leptocorisa oratorius Fab. (Hemiptera: Alydidae) in relation to the meteorological parameters and their damage potential in rice ecosystem in Dhubri district of Assam during Sali 2019 & 2020. The incidence of gundhi bug infestation commenced during second week of October and attained its peak population during first week of November i.e the 44^th standard meteorological week (SMW). The correlation studies between incidences of L. oratorius with meteorological parameters revealed that only rainfall (r= - 0.606) showed significant negative correlation whereas, other parameters showed non-significant correlation during 2019. However during 2020, the incidence of L. oratorius showed significant positive relationship with bright sunshine hour (r = 0.704) and significant negative correlation with morning relative humidity (r = -0.817) whereas, other parameters showed non-significant correlation. During the survey period, the percent grain infestation due to gundhi bug was recorded as 25.95 and 26.77 during 2019 & 2020, respectively.