Beanfly Infestation on Common Beans (Phaseolus Vulgaris L.) in Kenya

  • J. H. Nderitu
  • H. Y. Kayumbo
  • J. M. Mueke
Research Article


The population patterns of eggs, larvae and puparia in the bean plants and leaf punctures made by adults were investigated during cropping (March-July and October-January) and noncropping (July-October) seasons at two sites in Kenya. The beans planted in noncropping seasons had more leaf punctures, eggs, larvae and puparia than beans planted in cropping seasons. Beans planted in noncropping season attracted unusually high population from surrounding weeds as well as previous crop which cause severe damage. Under field conditions Ophiomyia spencerella Greathead and Ophiomyia phaseoli Tryon were the species of bean flies infesting the bean plants in all seasons. Both O. spencerella and O. phaseoli normally oviposited in punctures on the leaves but O. spencerella also oviposited in the stems of bean seedlings.

Key Words

Ophiomyia phaseoli Ophiomyia spencerella beanflies cropping seasons noncropping seasons leaf punctures eggs larvae pupae/puparia 


Les echantillons des oeufs, larves et chrysallides sur les haricots et les perforations faites sur les feuilles par les adultes ont èté analysé pendant les deux saisons Mars-Juillet et Octobre-Janvier ainsi que pendant les mois de Juillet à Octobre dans deux locations au Kenya. Les haricots plantés entre Juillet et Octobre avaient plus des feuille perforées, beaucoup d’ouefs, larves et chrysallides par rapport aux haricots plantés pendant les autres saisons. Les haricots plantés entre Juillet et Octobre ont attiré beaucoup des mauvaises herbes et d’autres cultures qui peu vent causées des pertes enormes. Sur les champs Ophiomyia spencerella Greathead et O. phaseoli Tryon etaient les espèces d’insectes attacquant les haricots pendant toutes les saisons. Toutes les deux espèces pondaient normalement sur les feuilles perforées bien que O. spencerella puissent pondre sur les tiges des haricots en germination.

Mots Clefs

Ophiomyia phaseoli Ophiomyia spencerella saisons de cultures perforations sur les feuilles oeufs larves chrysallides 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Greathead D. J. (1968) A study in East Africa of the beanflies (Diptera: Agromyzidae) affecting Phaseolus vulgaris L. and their natural enemies, with the description of a new species of Melanagromyza Hend. Bull. Entomol. Res. 59, 541–561.CrossRefGoogle Scholar
  2. Kibata G. N. (1980) Seasonal incidence and control of beanfly, Ophiomyia phaseoli Coq. Kenya Entomol. Newsl. 11, 13.Google Scholar
  3. Mueke J. M. (1979) Seasonal abundance and problems of controlling beanfly in Kenya. Symposium of Grain Legume Improvement in East Africa, Nairobi. 22–24 August, 1979.Google Scholar
  4. Njuguna S. K., Ndegwa A. M. M., van Rheenen H. A. and Mukunya D. M. (1980) Bean production in Kenya. In Potential for Field Beans in East Africa. Proc. of Regional Workshop, Lilongwe, Malawi, March 1980. pp. 34–53.Google Scholar
  5. Okinda A. F. (1979) Influence of the beanfly (Diptera: Agromyzidae) on the performance of french beans (Phaseoli vulgaris L.) and some aspects of its chemical control in Kenya. Msc. Thesis. University of Nairobi, Kenya.Google Scholar
  6. Omunyin M. E., Stoetzer H. A. I., Kinyua G. K. and Pere M. (1984) Food beans: Pests and other field problems. Phaseolus: Beans Newsl. East Afr. 3, 8–9.Google Scholar
  7. Schonherr S. and Mbugua E. S. (1976) Bean production in Kenya’s Central and Eastern Provinces. Institute of Development Studies, University of Nairobi, Kenya. Occasional paper no. 23, 69 pp.Google Scholar
  8. Singh S. R. and van Emden H. F. (1979) Insect pests of grain legumes. Annu. Rev. Entomol. 24, 255–278.CrossRefGoogle Scholar
  9. Spencer K. A. (1985) East Africa Agromyzidae (Diptera): Further description, revisionary notes and new records. J. Nat. Hist. 19, 969–1027.CrossRefGoogle Scholar
  10. Swaine G. (1968) Studies on the biology and control of pests of seed beans (Phaseolus vulgaris L.) in Northern Tanzania Bull. entomol. Res. 59, 232–238.Google Scholar
  11. Walker P. T. (1960) Insecticide studies on East Africa pests. III—Seed dressing for control of the beanfly, Melanagromyza phaseoli Coq. in Tanganyika. Bull. entomol. Res. 50, 781–793.CrossRefGoogle Scholar
  12. Wallace G. B. (1939) French beans diseases and beanfly in East Africa. East Afr. agric. J. 5, 170–175.Google Scholar
  13. Wallace G. B. (1941) Yellow Bean Mosaic and notes on other bean diseases. East Afr. agric J. 7, 114–115.Google Scholar

Copyright information

© ICIPE-ICIPE Science Press 1990

Authors and Affiliations

  • J. H. Nderitu
    • 1
  • H. Y. Kayumbo
    • 1
  • J. M. Mueke
    • 1
  1. 1.National Agricultural LaboratoriesNairobiKenya

Personalised recommendations