Author(s):

Ajita Soren, MK Chakravarty, PK Singh, Binay Kumar, Alka Kumari, Chitrangada Pandey and Sushila Tudu

Abstract: A field trial was conducted at the Commercial Horticulture Unit of Birsa Agricultural University, Kanke, and Ranchi during rabi season of 2016-2017 and 2017-2018, in order to monitor the incidence and abundance of leafhopper. The activity of leafhopper started soon after the transplanting. The serious activities were noticed from 34^th August 2016 to second January 2017. The highest leaf hopper number per leaf was found as (12.0/3 leaves) at maximum temperature and minimum temperature 24.6^O C and 4.8^oC, respectively. The correlation was found positive and highly significant (r= -0.666**) with maximum temperature (r= -0.666**) and (r = -0.536*) minimum temperature. The maximum relative humidity and minimum relative humidity was (r = 0.288) and (r = -0.096) respectively observed the positively non-significant and positively non-significant correlation with population of leafhopper. In the year 2017-18, the peak (11.6/ 3 leaves) activity of leafhoppers was recorded at 46^th SMW. The pest was active throughout the season with a fluctuation range of 0.0 to 11.6 aphid per three leaves. The abiotic factors together were able to explain up to the extent of 78-74 per cent population dynamics fluctuation in leafhopper.

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