Indian Journal of Agricultural Research
Year : 2010, Volume : 44, Issue : 1
First page : ( 8) Last page : ( 13)
Print ISSN : 0367-8245.

Diversity in the Virus Yield of Helicoverpa Armigera Nuclear Polyhedrosis Virus (Hanpv) Isolates*

Kambrekar D.N.¹, Kulkarni K.A.

Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad-580 005, India.

*A part of Ph. D. Thesis of the first author

¹Corresponding Author: Regional Agricultural Research Station (RARS), UAS campus, P. B. No. 18, Bijapur-586 101, Karnataka.

Abstract

An experiment was conducted to assess the polyhedral occlusion body (POB) yielding capacity of different isolates in Helicoverpa armigera (Hubner). The average POB yield varied between 8.91×10¹⁰ to 2.42×10¹⁰ POBs. Gulbarga isolate excelled over other isolates in producing maximum yield which recorded an average of 8.91×10¹⁰ POBs followed by Coimbatore isolate with 7.51×10¹⁰ POBs. Further, Gulbarga isolate recorded four times more POBs yield compared to Kalpavruksha isolate as evident from the total viral yield in terms of LE. The average POB yield per larvae ranged from 2.11×10⁹ to 1.21X10⁹ POBs. Gulbarga isolate excelled over other isolates in producing highest number of POBs per larvae (2.11×10⁹ POBs), followed by Coimbatore isolate (1.87×10⁹POBs). The average number of larvae to yield one larval equivalent ranged between 7.07 to 11.94 larvae. Gulbarga isolate required on an average 7.09 virosed larvae to produce 6.00×10⁹ POBs as against BPL isolate which required on an average 11.94 larvae to yield the same amount of virus.

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Key words

Helicoverpa armigera, Insecf Virus, HaNPV.

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