Journal of Entomological Research
SCOPUSWeb of Science
  • Year: 2008
  • Volume: 32
  • Issue: 4

Detection of Asian rice gall midge, Orseolia oryzae (Wood-Mason) biotype 1 in Kodagu District, Karnataka, South India

  • Author:
  • L. Vijay Kumar, A.K. Chakravarthy, S.U. Patil1, D. Rajanna2
  • Total Page Count: 8
  • Page Number: 265 to 272

Department of Agricultural Entomology, UAS, GKVK, Bangalore - 560 065, Karnataka, India.

*Corresponding author's: E-mail: vijigall@gmail.com

1Agricultural Research Station, Kankanady, Mangalore - 575 002.

Abstract

The virulence composition of Asian rice gall midge, Orseolia oryzae was studied by using three standard differentials viz., W1263 (Gm1 gene for resistance), Phalguna (Gm2 gene for resistance) and TN1 (susceptible without any gene). Based on the reaction pattern of standard differentials to gall midge populations, the biotype 1 population was detected at Madikeri and Ponnampet, the populations expressed their virulence only against susceptible group consisting TN1 differential. The female to male sex ratio of their F1 was close to 3:1 in TN 1, these results clearly indicated the prevalence of genetically homogeneous biotype 1 population with avirulent to both Gm1 (W1263) and Gm2 (Phalguna) genes for resistance.