Leaf reddening index as an indicator of leaf reddening malady in bt cotton hybrids: causes and remedies
Jun 15, 2019

Breeding & Genetic improvement Disease control Biomol - Biotechnology Network coordination Network-MedMiddleEast Biomol - Biotech-Asia Disease-Asia-51 Breeding-Asia

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Y. Rakshitha1, B. S. Janagoudar* and A. Amaregouda2

1 Postgraduate scholar, 2 Professor of Crop Physiology

*        Correspondence : Dr. B. S. Janagoudar, Dean (Agri), College of Agriculture,

University of Agricultural Sciences, Dharwad – 580 005, Karnataka, India e-mail : bjanagoudar56@gmail.com, deanacd@uasd.in


In the recent past, leaf reddening has been a major problem in Bt-cotton and this is an outcome of interaction of location, variety, environmental condition and nutrients. In general, inter and intra specific tetraploid Bt hybrids are more sensitive and vulnerable to this malady may be because of Bt gene interaction. Leaf reddening may occur at any growth stage of the crop. At grand growth  phase (flowering and boll development) any hindrance in the assimilate production, translocation and distribution intensifies the leaf reddening effect and symptoms are prolific in nature under extreme stress situations (Poongothai et  al., 2010).


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