Vol. 17 No. 3
Effect of date of transplanting of rice on the incidence of leaf folder (Cnaphalocrocis medinalis Guenee) in Ranchi, Jharkhand
Abstract: The present field experiment was conducted during kharif 2019 and 2020 with an objective to study the effect of transplanting dates on incidence of leaf folder (Cnaphalocrocis medinalis G.) in rice variety Naveen. The data on leaf folder incidence was recorded in all two seasons trials, the experiments comprised of three dates of transplanting i.e. 1st July, 20th July and 9th August in trial plots in Randomized Block Design and it replicated ten times. It was evident from the data that significant differences occurred among transplanting dates pertaining to percentage of leaf damage due to leaf folder. Rice crop transplanted late; 9th August was heavily infested by leaf folders (15.69 %) and minimum infestation by leaf folders was recorded (7.30 %) in early transplanted crop i. e.1st July.There was maximum yield of rice grain in early (46.76 q ha-1) followed by normal (43.64 q ha-1) and late (36.13 q ha-1) transplanted rice. In brief, earlier was the date of planting lesser was the pressure of attack of pest complex and higher was the realization of grain yield.So, early transplanting can be the one of best cultural practices to reduce the incidence of leaf folder.
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