Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-28T20:05:59.408Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on the legume pod-borer, Maruca testulalis Geyer—VII. Field surveys on pathogenic microorganisms

Published online by Cambridge University Press:  19 September 2011

W. A. Otieno ,
M. O. Odindo ,
J. B. Okeyo-Owuor  and
D. M. Sabwa
W. A. Otieno
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
M. O. Odindo
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
J. B. Okeyo-Owuor
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
D. M. Sabwa
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
Get access

Abstract

Field surveys along the Lake Basin and the Coastal regions of Kenya were carried out to assess the natural incidence of pathogenic microorganisms associated with the legume pod-borer, Maruca testulalis Geyer on the cowpea crop. A regular sampling regime was maintained on plots planted with four varieties of cowpea: T VX 66–2H, Vita 3 (TVU 1190), Ex-Luanda and Nyar-Milambo. Larvae of M. testulalis were recovered from the flowers and pods of the crop, and subjected to routine laboratory disease diagnosis including: tissue examination, culture incubation, microscopy and pathogen identification. The main groups of pathogenic microorganisms found to act as natural mortality factors to M. testulalis larvae include: protozoa, bacteria, fungi and a virus. A higher level of disease incidence and diversity on M. testulalis larvae occurred in the lake basin region of Kenya than the coastal part.

Keywords

Pathogenic microorganismsMaruca testulalispreliminary field surveycowpea (Vigna unguiculata L. Walp)
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 4 , Special Issue 1-2: Crop-Borers and Emerging Strategies for their Control , June 1983 , pp. 211 - 215
Copyright
Copyright © ICIPE 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bohlen, E. (1973). On pests of pulses and their control. In Crop Pests in Tanzania and Their Control. Edited by the Federal Agency for Economic Cooperation. Paul Parey, Berlin.Google Scholar
Booker, R. H. (1965) Pests of cowpea and their control in northern Nigeria. Bull. ent. Res. 55, 663–672.CrossRefGoogle Scholar
Breed, R. S., Murray, E. G. C. and Smith, N. R. (1957) Bergey's Manual of Determinative Bacteriology. (7th edition), Williams & Wilkins Company, Baltimore, 1094 pp.Google Scholar
Burges, H. D. (1981) Microbial Control of Pest and Plant Diseases 1970–1980. Academic Press, New York, 949 pp.Google Scholar
Hughes, K. U. (1957) An annotated list and bibliography of insects reported to have virus diseases. Hilgardia 26, 629 pp.CrossRefGoogle Scholar
Koehler, C. S. and Mehta, P. N. (1972) Relationships of insect control attempts by chemicals to components of yield of cowpea in Uganda. J. econ. Ent. 65, 1421–1427.CrossRefGoogle ScholarPubMed
Ignoffo, C. M., Marston, N. L., Puttier, B., Hostetter, D. L., Thomas, G. D., Biever, K. D. and Dickerson, W. A. (1976) Natural biotic agents controlling insect pests of Missouri soybeans. World Soybean Research, pp. 562–578.Google Scholar
Martignoni, M. F. and Langston, R. L. (1960). Supplement to an annotated list and bibliography of insects reported to have a virus disease. Hilgardia 30, 1–40.CrossRefGoogle Scholar
Odebiyi, J. B. (1981) Studies on the biology of the cowpea pod-borer, Maruca testulalis in Kenya—I. Determination of the larval instars. Insect Sci. Application. 1, 339–341.Google Scholar
Okeyo-Owuor, J. B. and Ochieng, R. S. (1981) Studies on the legume pod-borer, Maruca testulalis Geyer—I. Life cycle and behaviour. Insect Sci. Application. 1, 263–268.Google Scholar
Singh, S. R. and Van Emden, H. F. (1979) Insect pests of grain legumes. A. Rev. Ent. 24, 255–278.CrossRefGoogle Scholar
Skerman, V. B. D. (1967) A Guide to the Identification of the Genera of Bacteria. (2nd edition), Williams and Wilkins, Baltimore, Maryland, 303 pp.Google Scholar
Smirnoff, W. A. (1962) A staining method for differentiating spores, crystals, and cells of Bacillus thuringiensis (Berliner). J. Insect Pathol. 4, 384–386.Google Scholar
Steinhaus, E. A. and Marsh, G. S. (1962) Report of diagnoses of diseased insects, 1951–1961. Hilgardia 33, 349–390.CrossRefGoogle Scholar
Summerfield, R. J., Huxley, P. A. and Steel, W. (1974) On cowpea (Vigna unguiculata L. Walp) In Field Crop Abstracts Vol. 27, pp. 301–312.Google Scholar
Taylor, T. A. (1968) Effect of insecticide application on insect damage and performance of cowpea in southern Nigeria. Nigeria agric. J. 5, 29–37.Google Scholar
Waterhouse, G. M. (1975) Key to the species of Entomophthora Fres. Bull. Brit. Mycolog. Soc. 9, 15–41.CrossRefGoogle Scholar