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Screening elite genotypes and IPM of defoliators in groundnut

KrishiKosh

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Title Screening elite genotypes and IPM of defoliators in groundnut
 
Creator Rashmi S.Yambhatani
 
Contributor R.K.Patil
 
Subject Agricultural Entomology
 
Description Screening elite genotypes and IPM of defoliators in groundnut were studied during
Kharif 2009, at Main Agricultural Research Station, UAS, Dharwad. The seven groundnut
genotypes were screened for Spodoptera litura (F.) resistance in the field. The genotypes viz.,
Mutant-III and ICGV-86699 Tan showed 11.5 and 12.0 per cent leaf damage compared to
44.0 per cent foliar damage in susceptible check, JL-24.
The detailed investigation on biology of S. litura on these seven genotypes further
confirmed with the field screening studied by recording longest larval period (22.83 and
23.67 days), pupal period (11.67 and 11.33 days), lowest adult longevity (9.67 and 9.33 days)
and fecundity (379.67 and 386.0 eggs/ female) in Mutant-III and ICGV-86699 Tan
respectively. Whereas susceptible check, JL-24 has recorded shortest larval period (17.93
days), pupal period (9.83 days), higher adult longevity (11.83 days) and fecundity (592.0
eggs/ female). The resistant genotypes, Mutant-III and ICGV-86699 Tan permitted S. litura
to complete its life cycle in longest period (48.92 and 49.00 days respectively) compared to
susceptible varieties, JL-24 and GPBD-4 (41.02 and 41.00 days respectively). The other
genotypes GPBD-5, GPBD-6 and ICGV-86699 Red were intermediate. The effects of these
resistant genotypes on the growth and development of S. litura could obviously be due to
chemical factor i.e. antibiosis.
Among different IPM modules, Module-II proved as effective IPM module in
reducing defoliator population, enhancing natural enemy population and recording higher
yield (39.95 q/ha) with maximum net returns (Rs.89,850/ha) and highest C:B ratio (1:5.1)
followed by Module-I. Module-II comprising of foxtail millet as intercrop (7:1) and
insecticide Emamectin benzoate (0.2 ml/lit) and M-I was totally bio-intensive module and it
comprising of sunflower as trap crop and Nomuraea rileyi spray and it was suitable for
northern transitional belt.
 
Date 2016-11-07T19:01:56Z
2016-11-07T19:01:56Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/84317
 
Format application/pdf
 
Publisher UAS, Dharwad