Brown plant hopper, Nilaparvata lugens is a major pest of paddy, which damages the plants directly by sucking the sap and indirectly by transmission of rice viruses such as ragged stunt virus and grassy stunt virus. Geographically N. lugens are distributed throughout South and South East Asia where rice is grown and feed the phloem of plant. Due to the uncontrolled use of insecticides, insecticide resistant plant hoppers were emerged in many geographical locations like Japan, South and Southeast Asia etc. In this study we have described the Phylogenetic status of N. lugens isolated from Kerala, India. This study revealed that, N. lugens isolated from Andhra Pradesh and a few populations of N. lugens isolated from China and Japan were genetically similar to N. lugens isolated from Kerala. The result of this study also revealed the biasness of COI sequence of N. lugens to nucleotides AT.
Key words: cytochrome oxidase, N. lugens, Phylogeny, Genetic divergence
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