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Resistance of Some Sorghum Lines to the Spotted Stalk-Borer Chilo Partellus Under Western Kenya Conditions

  • Z. T. Dabrowski
  • E. L. Kidiavai
Article

Abstract

Field observations on Chilo infestation of 100 promising sorghum lines showed that there are six levels of relationship affecting plant colonization and damage level by stem-borers: non-preference for oviposition (E 302, E 303, IS 1044, IS 1151, IS 2162, IS 4660, IS 17739, IS 18328, IS 18349, IS 18479, and IS 18489); feeding of the first larval instars on young leaves (reduced on E 302, E 303, IS 1044, IS 2162, IS 2209, IS 18349 and IS 18427); causing of ‘dead hearts’ by young larval instars due to extensive feeding in stems of young plants (lower for IS 2162, IS 2263, IS 18328, IS 18349); tunnelling (extent and location) of older instars in stems (low in IS 4660, IS 18427 and IS 18479); tolerance of plants to leaf damage (in spite of high damage, plants form panicles) (IS 2205); and tolerance of plants to larval feeding in stems (in spite of high tunnelling, the plants form seeds). The effect of a number of cultivars showing different levels and mechanisms of resistance on the Chilo behaviour and biology was studied in depth under field conditions.

Key Words

Chilo partellus the spotted stalk-borer antibiosis tolerance non-preference oviposition preference resistance sorghum 

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References

  1. Doggett H. (1970) Sorghum. Longmans, Green, London, 403 pp.Google Scholar
  2. Jotwani M. G. and Davies J. C. (1980) Insect resistance studies on sorghum at International Institutes and National Programmes with special reference to India. In Biology and Breeding for Resistance to Arthropods and Pathogens in Agricultural Plants (Edited by Harris M. K.), pp. 224–236. Texas A & M University System, College Station, Texas.Google Scholar
  3. Jotwani M. G., Chaudhari S. and Singh S. P. (1978) Mechanism of resistance to Chilo partellus (Swinhoe) in sorghum. Indian J. Ent. 40, 273-76.Google Scholar
  4. Seshu Reddy K. V. and Davies J. C. (1978) A new medium for mass rearing of the sorghum stem-borer, Chilo partellus Swinhoe (Lepidoptera: Pyralidae) and its use in resistance screening, Ind. J. Pl. Production 48–55.Google Scholar

Copyright information

© ICIPE 1983

Authors and Affiliations

  • Z. T. Dabrowski
    • 1
  • E. L. Kidiavai
    • 1
  1. 1.The International Centre of Insect Physiology and Ecology (ICIPE)NairobiKenya

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