Field performance of second generation (BG-II) Bt cotton genotypes against bollworm complex under rainfed conditions

Authors

  • S. G. Onkaramurthy Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad-580 005, Karnataka,
  • K. Basavana Goud Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad-580 005, Karnataka,
  • S. S. Udikeri Department of Agricultural Entomology, University of Agricultural Sciences Dharwad-580 005, Karnataka, India

Keywords:

Bt cotton, Bollworms, cry1Ac, cry1Ac cry2Ab.

Abstract

A field experiment was conducted at Main Agricultural Research Station, Dharwad, Dharwad (Karnataka, India) to investigate the performance of second generation Bt cotton genotypes under rainfed condition. All second generation Bt genotypes with cry1Ac + cry2Ab genes have shown high level of resistance to all the three species of bollworms. The incidence of bollworms did not cross economic threshold in BG-II hybrids. First generation Bt genotypes with cry1Ac genotypes bollworms crossed economic threshold level for two times. Compared with BG-I and non Bt genotypes all the BG-II genotypes were found to be better with respect to larval incidence and damage by bollworms.MRC-7351 BG-II recorded highest seed cotton yield of 20.37 q/ha being at par with KDCHH-621 BG-II (19.75), MRC-7201 BG-II (19.13), and Bunny Bt BG-II (18.60), but superior to BG-I genotypes without any protection against bollworms. 

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Published

2016-01-01

How to Cite

Onkaramurthy, S. G., Goud, K. B., & Udikeri, S. S. (2016). Field performance of second generation (BG-II) Bt cotton genotypes against bollworm complex under rainfed conditions. Journal of Phytopathology and Disease Management, 3(1), 12–20. Retrieved from https://ppmj.net/index.php/ppmj/article/view/32

Issue

Vol. (3), Issue (1)

Section

Research Articles

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