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The leaf hopper is Based on the varietal observation the least number of the hoppers were observed on Mallika, Baneshan and Totapari. The varieties like Raspuri, Langra and Kesar were infestated by moderate number of leafhoppers. The leafhoppers mean population were highest during the fruiting period in the varieties such as Dasheri, Mulgoa, Neelum and Alphanso. During 2015-16, the excluding Alphanso, Neelum and Mallika, the weather parameters like maximum and minimum temperature displayed significantly positive correlation for leafhoppers population with r=0.60 to 0.77 and r=0.50 to 0.67 respectively. Similarly, many varieties, the relative humidity (both maximum and minimum) displayed negative significant correlation (r=-0.50 to -0.66) except Neelum, Mallika, Dasheri and Langra varieties. During second year 2016-17, excluding Mallika, Neelum and Alphenso, remaining varieties showed significant positive correlation with minimum temperature (r=0.52 to 0.70). In contrary against all the variety minimum RH showed significantly negative correlation (r=-0.57 to -0.71) and maximum RH showed significant negative correlation in Totapari (r=-0.69), Mulgoa (r=-0.62), Baneshan (r=-0.68), Dasheri (-0.58) and Langra (-0.63), but no such relations were observed in other varieties.

Keywords: Leafhoppers, mango, varieties, population dynamics, weather parameters, N-E Karnataka.