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The leafhoppers alone can cause 20-100 per cent inflorescence loss in mango during vegetative and reproductive phases of the tree. They have different species composition across the mango growing area. The survey conducted across the different location of the mango growing in Karnataka during 2015-14. The result showed that the leafhoppers diversity by Shannon diversity index documented that the Brahmavara (0.61), Bidar (0.60) and Shivamogga (0.56), in contrary least was observed in Gadag (0.35), Kolar (0.39) and Dharwad (0.41) district of the Karnataka. The dominance of the leafhoppers by Simpson index recorded that highest was in Brhamavara and Bidar i.e 0.32 each and lowest dominance was in Gadag (0.16), Kolar (0.19) and Dharwad (0.20). The richness by Margalef’s index displayed highest was in Belagavi (0.59) and Shivamogga districts (0.56), and least was observed in other districts ranged from 0.36 to 0.41. The abundance of the different leafhoppers species across the Karnataka revealed that the Idioscopus nitidulus (89%) was commonly prevailing and observed in all the locations followed by Amritodus atkinsoni (9%). Based on the maximum availability, the ranking was made as follow; Idioscopus nitidulus>Amritodus atkinsoni>Idioscopus nagpuriensis>Idioscopus clypealis.

Keywords: Mango leafhoppers, Species diversity, Shannon diversity, Simpson index, Margalef’s index.