Indian Society of Genetics & Plant Breeding


Improvement of resistance level in selected maize genotypes through cycles of selection against pink borer, Sesamia inferens Walker

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Pink borer (Sesamia spp.) is an important insect pest
of maize (Zea mays L.). In India two species of Sesamia
viz., S. inferens Walker and S. uniformis Dudgeon are
reported [1] S. inferens is predominant throughout the
year in the Peninsular India, particularly in the states of
Andhra Pradesh, Karnataka, Tamil Nadu and
Maharastra. During rabi season it also causes extensive
damage to the maize crop in several northern states
like Uttar Pradesh, Assam, Bihar, Delhi, Punjab, Orissa,
Madhya Pradesh, Haryana, West Bengal and Andaman
islands. The adults pink borer lays eggs inside the leaf
sheath. The typical symptoms of pink borer damage
are gummy oozing with water soaked lesions at the
bottom of leaf sheaths, oblong holes in unfolded leaves,
drying of central shoots and dead heart in young plants
[2]. Losses due to S. inferens in rabi season varies
from 25.7 to 78.9 percent [3]. causing an estimated loss
of 11.05 crore rupees in India annually [4]. Thus effective
control of pink borer may significantly contribute towards
augmenting yield potential of rabi maize across the
country and in kharif and rabi maize in peninsular India.
Resistance breeding holds immense potential in
controlling this pest in a durable and ecologically
sustainable manner. However, resistant lines fully
acclimatized to Indian conditions which can be utilized
directly in insect resistance breeding programme, is
limiting. Though a few tolerant lines, viz., CML67 and
CML139 are available, it could not be acclimatized to
our conditions because of their poor performance under
low N conditions [5]. Thus there is an emerging need to
develop materials with improved level of resistance/
tolerance to pink borer which are suitable to Indian
growing environment.

Keywords: N/A


Year: 2010
Volume: 70
Issue: 2
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Sujay Rakshit info_circle
Pradyumn Kumar,Sain Dass info_circle
Rakesh K. Sharma info_circle
M. Anuradha, R. Sai Kumar info_circle

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