Author : Priti Priya 1
Date of Publication :26th June 2021
Abstract: Field experiment on population dynamics of rice leaf folder Cnaphalocrocis medinalis (Guenee) and its correlation with weather parameters was conducted at rice research farm of Birsa Agricultural University, Kanke, Ranchi during 2018-2019. The results revealed that initial incidence of leaf folder started during 34th standard week with 13.0% leaf damage. Then, the infestation increased gradually and attained its peak in 40th standard week with 21.4% leaf damage. Later, the pest incidence began to decline and minimum level of infestation was recorded in 45th standard week with 1.0 % leaf damage. There was significantly positive correlation with maximum temperature (r = 0.551**) at 5% level of significance. A non-significant negative relationship of % leaf damage was found with minimum temperature (r = -0.074) and RH at 2 PM. (r = -0.405), whereas other parameters showed a non-significant positive relationship with the leaf folder infestation.
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