African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Influence of morphological traits on resistance of groundnut genotypes for thrips

A. Rama Krishna Rao*
  • A. Rama Krishna Rao*
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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T. Murali Krishna
  • T. Murali Krishna
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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K. John
  • K. John
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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P. Sudhakar
  • P. Sudhakar
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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K. Devaki
  • K. Devaki
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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P. B. Rajendra Prasad
  • P. B. Rajendra Prasad
  • Department of Entomology, Regional Agricultural Research Station (RARS), Tirupati-517502, India.
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  •  Received: 17 April 2014
  •  Accepted: 18 November 2014
  •  Published: 22 January 2015

Abstract

The field experiments were conducted with 69 groundnut genotypes in a randomized block design during kharif, 2011 and 2012 with three dates of sowing to identify resistant entries for thrips in groundnut at Sri Venkateswara S. V. Agricultural College Farm, Tirupati, Andhra Pradesh A.P. The studies revealed that the entries viz., IVK-I-2007-I-16, K-1814, K-1789, K-9, K-1811, TCGS-1114, TCGS-1137, TCGS-1218, TCGS-1274, TCGS-1043, ICGV-07045, ICGV-06039, ICGV-07045, ICGV-00351, ICGV-07234, ICGV-87846, ISK-I-2011-16 and ISK-I-2011-14 have shown resistance to thrips and also recorded higher pod yield in all the three dates of sowing during both kharif, 2011 and 2012. The resistance to thrips in these genotypes might be due to high leaf and stem trichomes, more leaf thickness and dark green foliage. Genotypes viz., K-9, K-1789. ISK-I-2011-16, ISK-I-2011-14, TCGS-1218 and TCGS-1043; some of the genotypes  had the characteristic features of wavy margin leaves and downward folding of the leaves, which contribute to the restriction of thrips movement. These genotypes might be used as source of resistance to thrips in groundnut breeding programme.

 

Key words: Morphological, genotypes, yield, thrips, groundnut.