Author(s):

Bhupesh Joshi, VK Soni and DK Rana

Abstract: Impact of the various abiotic and biotic parameters on population of sugarcane leaf hopper, <em>Pyrilla perpusilla </em>(Walk.) was studied during 2016-17 and 2017-18 at Kawardha (Kabirdham) district of Chhattisgarh. On the basis of pooled mean various abiotic parameters <em>viz.</em> Maximum temperature, minimum temperature, relative humidity and sunshine hours and biotic parameters <em>viz.</em> egg parasitoid <em>Tetrastichus pyrillae </em>(Chrawford) and<em> </em>ento-pathogenic fungus, <em>Metarhizium anisopliae</em> (Metschn)<strong><em> </em></strong>were showed positive impact on the population of <em>Pyrilla</em> but in case of wind velocity and rainfall negative impact were shown. The <em>Pyrilla</em> population was reached maximum with 8.13 eggs, 28.16 nymphs and 5.17 adults leaf^-1at first fortnight of October. During this period, pooled two year mean maximum temperature, minimum temperature, relative humidity, rainfall, wind velocity and sunshine was 31.7⁰C, 24.7⁰C, 80.3%, 26mm, 2.0 Km hr^-¹ and 7.4 hr day^-¹<strong> </strong>respectively. The maximum parasitization by<em> T. pyrillae</em> was noticed during second fortnight of December with 44.16 per cent and ento-pathogenic fungus<em> M. anisopliae </em>was high during the second fortnight of October with 11.37 per cent. In various abiotic weather parameters, the maximum temperature play significantly important role in the fluctuation the population of <em>P. perpusilla.</em>

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