The Effect of Differential Pest Load of Leaf Folder, Cnaphalocrocis medinalis (Guenee) on Extent of Leaf Damage and Alteration in Leaf Biochemical Composition in Rice
Bhubanananda Adhikari *
Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India.
L. N. Mohapatra
Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India.
S. D. Mohapatra
ICAR-National Rice Research Institute, Cuttack, Odisha, India.
Radhakrushna Senapati
ICAR-National Rice Research Institute, Cuttack, Odisha, India.
Rashmirekha Singh
Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India.
Satya Narayan Satapathy
Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India.
*Author to whom correspondence should be addressed.
Abstract
The effect of feeding damages induced by the leaf folder, Cnaphalocrocis medinalis (Guenee) at various damage levels on the biochemical parameters of rice leaves was investigated along with the estimation of leaf roll rate. The leaf roll rate was shown to be higher as the pest population increased. Biochemical profile of rice leaves damaged by a leaf folder was studied for quantitative and qualitative variations in soluble carbohydrate, starch and the ratio of chlorophyll a/b using standard biochemical procedures. The tests were carried out on a susceptible rice variety TN1. The result revealed that with increase in infestation by C. medinalis resulted in decreased soluble carbohydrates and starch content in rice leaves. But the trend was different for chlorophyll a/b and the ratio was found higher in pest infested vegetation.
Keywords: Chlorophyll, leaf folder, rice, biochemical, carbohydrate, starch