Advertisement

Studies on Rice Stem-Borers in Kenya with Emphasis on Maliarpha Separatella RAG.

  • Dang Thanh Ho
  • J. J. Njokah
  • J. G. Kibuka
Article

Abstract

Survey and experiments were conducted to investigate the distribution and bionomics of the rice stem-borers in Kenya. Stem-borers collected and identified included: Maliarpha separatella Rag., Diopsis thoracica West, Sesamia calamistis Hmps. and Chilo partellus Swin. Maliarpha separatella were most abundant and infested throughout the crop season, D. thoracica infested during vegetative phase. S. calamistis frequently occurred at the onset of flowering stage toward harvest. C. partellus occurred more frequently in upland than lowland rice and was at low population. Assessment of crop loss caused by M. separatella was carried out under field, caged condition. It was observed that the per cent of empty grains was affected by Maliarpha infestation. Calculated yield loss based on percentage empty grains and number of ‘whiteheads’ was higher than the actual differences between grain weight of uninvested and infested crops.

Key Words

Rice stem-borers yield loss assessment Chilo partellus Diopsis thoracica Maliarpha separatella Sesamia calamistis 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Agyen Sampong M. (1978) The ecology of rice stem-borers in West Africa. A paper presented at inauguration of African Association of Insect Scientists at the International Centre of Insect Physiology and Ecology (ICIPE), Nairobi, Kenya, 5–8 December. 1978.Google Scholar
  2. Akinsola E. A. (1973) Resistance to the yellow borer. Tryporyza incertulas (Walker), in rice varieties. M.Sc. Thesis. Up College of Agriculture, Philippines.Google Scholar
  3. Akinsola E. A. (1980a) Notes on damage caused by Maliarpha separatella on deep flooded rice in Mali. WARDA Technical Newsletter V2 No. 2, 1.Google Scholar
  4. Akinsola E. A. (1980b) Effects of infestation by Diopsis thoracica (West) on rice plants. WARDA Technical Newsletter V2, No 2, 3–4.Google Scholar
  5. Anonymous (1977) Annual Report of WARDA (West Africa Rice Development Association). Special Research Project, Rokupr, Annual Report 1977. Monrovia, Liberia.Google Scholar
  6. Anonymous (1978) Annual Report of WARDA (West Africa Rice Development Association). Vol. 3. Monrovia, Liberia.Google Scholar
  7. Anonymous (1981) Entomology Section. Ahero Irrigation Research Station Technical Report. National Irrigation Board. Ministry of Agriculture of Kenya.Google Scholar
  8. Breniere J. (1969) Importance des problems entomologiques dans le development de la riziculture de L’Afrique de L’ouest. L’Aaron. Trop. 24, 906–927.Google Scholar
  9. Breniere T. (1970) Assessment of crop loss due to rice borer. In Crop Loss Assessment Methods (Edited by Chiarapa ), FAO and Commonwealth Agricultural Bureau.Google Scholar
  10. breniere J. (1976) The principal insect pests of rice in West Africa and their control. West Africa Development Association, Monrovia, Liberia.Google Scholar
  11. buddenhagen I. W. and Persley G. J. (1978) Rice in Africa, 1st edition. Academic Press, London.Google Scholar
  12. Monyo J. H. and Kanyeka Z. L. (1978) Country Statements. In Rice in Africa, 1st edition (Edited by buddenhagen I. W. and Persely G. J.). Academic Press. London.Google Scholar
  13. Munyua J. M. (1978) Country statements. In Rice in Africa. 1st edition (Edited by buddenhagen I. W. and Persley G. J.). Academic Press, London.Google Scholar
  14. Pathak M. D. (1975) Insect pests of rice and their control. International Rice Research Institute, Los banos, Philippines.Google Scholar
  15. Pollet A. (1978) Les insects du riz en Cote d’Ivoire. IV. Determinisme des infestations du riz irrigne en Cote d’lvoire. Centrale (Kotiessou). O.R.S.T.O.M. ser, bil., Vol. XIII No. 1, 87–99.Google Scholar
  16. Sandhu G. S. and Ramesh Chander (1975) Occurrence of green-striped borer, Maliarpha separatella Ragonot on sorghumin Punjab. J. bombay nat. Hist. Soc. 72, 872–873.Google Scholar
  17. Soto P. E. and Siddiqi Z. (1978) Insect pests and rice production in Africa. In Rice in Africa. 1st edition (Edited by buddenhagen I. W. and Persley G. J.), Academic Press, London.Google Scholar

Copyright information

© ICIPE 1983

Authors and Affiliations

  • Dang Thanh Ho
    • 1
  • J. J. Njokah
    • 1
    • 2
  • J. G. Kibuka
    • 1
  1. 1.The International Centre of Insect Physiology and Ecology (ICIPE)Mbita, South NyanzaKenya
  2. 2.Ahero Irrigation Research StationKisumuKenya

Personalised recommendations