volume 29 issue 1 (march 2009) : 28-31
COMPARATIVE EFFICACY OF NATIVE ISOLATES OF BACILLUS THURINGIENSIS BERLINER AGAINST CNAPHALOCROCIS MEDINALIS (GUENEE) ON RICE
1Regional Research Station,
PAU, Gurdaspur-143 521, India
Published In
Agricultural Science Digest
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volume 29 issue 1 (march 2009) : 28-31
COMPARATIVE EFFICACY OF NATIVE ISOLATES OF BACILLUS THURINGIENSIS BERLINER AGAINST CNAPHALOCROCIS MEDINALIS (GUENEE) ON RICE
1Regional Research Station,
PAU, Gurdaspur-143 521, India
ABSTRACT
Twenty two native and one standard check BtkHD-1 isolates were compared at different
concentration levels to evaluate their efficacy for the control of rice leaffolder. Among these isolates,
three native isolates, namely BtK4, BtC5 and BtJ showed more than 55% larval mortality of C. medinalis
at 10% concentration level of spore crystal mixture within 96 hrs of treatment. The maximum larval
mortality (61.88%) was achieved due to BtK4 isolate. The per cent larval mortality was dose dependent
of spore crystal mixture and it increased with increase in the post treatment period.
concentration levels to evaluate their efficacy for the control of rice leaffolder. Among these isolates,
three native isolates, namely BtK4, BtC5 and BtJ showed more than 55% larval mortality of C. medinalis
at 10% concentration level of spore crystal mixture within 96 hrs of treatment. The maximum larval
mortality (61.88%) was achieved due to BtK4 isolate. The per cent larval mortality was dose dependent
of spore crystal mixture and it increased with increase in the post treatment period.
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- Anonymous (2004) Foreign Agricultural Services Official USDA Estimate for Dec. 2004 www.fas.usda.govt/psd/ complet-tables/GF-table 11-176.
- Bentur, J. S. et al. (1999) Insect Sci. Application 19:223-28.
- Gupta, V.K. et al. (2000) Indian J. Ecology 27:76-81.
- Kaur, R. (2003) M.Sc. Thesis Punjab Agricultural University, Ludhiana, India.
- Lee et al (1998) Critical Issues in Insect Pest Management, Commonwealth Publishers, New Delhi. pp 385-21.
- Neelam, J. et al. (1999) J. Insect Sci. 12:147-48.
- Singh, G. (1996) M.Sc. Thesis Punjab Agricultural University, Ludhiana, India.
- Singh, J. et al. (1995) Int. Pest Control 37:144-45.
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In this Article
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Published In
Agricultural Science Digest