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Visalakshi Mahanthi

Acharya N. G. Ranga Agricultural University, India

Title: Field evaluation of entomopathogenic fungi against white grub, Holotrichia consanguinea Blanch in Sugarcane

Biography

Visalakshi Mahanthi has completed her PhD from Acharya N. G. Ranga Agricultural University (ANGRAU), Rajendranagar, Hyderabad. She is working as Senior Scientist (Entomology) at Regional Agricultural Research Station, Anakapalle, Visakhapatnam district under ANGRAU. She has published more than 20 papers in reputed journals.

Abstract

Field experiments were conducted on sugarcane for white grub management using two entomopathogenic fungi i.e., Beauveria bassiana and Metarhizium anisopliae in Pakki village, Bobbilli mandal of NCS sugars operational area in vizianagaram district, Andhra Pradesh during 2013-14. Two experiments were conducted in sugarcane plant crop by imposing treatments at the time of planting and at one month after planting. Among the treatments imposed at the time of planting, Metarhizium anisopliae @ 5x10 13 spores ha-1 applied in FYM enriched field was found effective followed by Beauveria bassiana @ 5x10 13 spores ha-1 applied in FYM enriched field and registered 93.6 % and 88.09 % decrease in white grub damage and 77.22 % and 74.08 % decrease in white grub population. The highest cane yield was recorded when Metarhizium anisopliae @ 5x1013 spores ha-1 (81.44 t ha-1) applied in FYM enriched field followed by Beauveria bassiana @ 5x10 13 spores ha-1 ( 76.6 t ha-1 ) applied in FYM enriched field. Whereas among the treatments imposed at one month after planting, Metarhizium anisopliae @ 5x10 13 spores ha-1 in FYM enriched field was found effective followed by Beauveria bassiana @ 5x1013 spores ha-1 in FYM enriched field and registered 87.89% and 86.2 % decrease in white grub damage and 76.93 % and 69.2 % decrease in white grub population. Metarhizium anisopliae @ 5x10 13 spores ha-1 (79.73 t ha-1) applied in FYM enriched field recorded highest cane yield followed by Beauveria bassiana @ 5x10 13 spores ha-1 (76.45 t ha-1) applied in FYM enriched field at one month after planting. However, highest percent yield increase was recorded in Metarhizium anisopliae @ 5x10 13 spores ha-1 (71.56 %) applied in FYM enriched field at the time of planting.

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