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Development of stable resistant cultivars for stem-borer, Chilo partellus (Swinhoe) in sorghum

Published online by Cambridge University Press:  19 September 2011

Prem Kishore
Prem Kishore
Affiliation:
Division of Entomology, Indian Agricultural Research Institute, New Delhi 110012, India
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Abstract

Twelve cultivares were grown along with released high yielding hybrid CSH-1 (susceptible to stem-borer) to investigate their relative resistance to stem-borer at three locations. Results obtained have established that the 12 cultivars possess moderate levels of resistance to stem-borer. The damage suffered by them was significantly lower than CSH-1. Further, four cultivars viz. E601, E 602, E 603 and E 604 suffered less damage.

The stability of the resistance was worked out by following the model of Eberhart and Russell (1966) [Crop Sci. 6, 36–40]. The means of various cultivars were calculated and regression coefficients (bi) were tested against unity to locate most adaptable cultivar for borer damage. The cultivar × environment interactions for leaf injury and stem tunnelling (two parameters used for assessing stem-borer damage) were significant and in most of the cases were due to linear response of different cultivars. Cultivar E 601 proved to be most promising and stable for resistance to stem-borer.

Keywords

Stem-borerChilo partellus (Swinhoe)host plant resistanceleaf injurystem tunnellingcultivarstablestability of resistancestability analysiscultivar-environment interaction
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 5 , Issue 6 , December 1984 , pp. 475 - 479
Copyright
Copyright © ICIPE 1984

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References

REFERENCES

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