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Susceptibility of Dysdercus species Boisduval (Hemiptera: Pyrrhocoridae) to Selected Synthetic Pyrethroids

Published online by Cambridge University Press:  19 September 2011

A. M. Mambiri  and
B. M. Khaemba
A. M. Mambiri
Affiliation:
Department of Zoology, University of Nairobi, P.O. Box 30197, Nairobi, Kenya
B. M. Khaemba
Affiliation:
Department of Zoology, University of Nairobi, P.O. Box 30197, Nairobi, Kenya
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Abstract

Relative susceptibility of laboratory-established cultures of four populations of Dysdercus fasciatus Sign. and one population each of D. nigrofasciatus Stal., D. cardinalis Gerst, and D. superstitiosus (F.) to topical applications of cypermethrin, fenvalerate and permethrin was investigated at Kibos, Kenya. The LD50 values of the three chemicals to populations of D. fasciatus were 0.0656–0.0757, 0.335–0.469, 0.442–0.505 μg/insect, respectively, while those for D. nigrofasciatus were 0.1690–0.2541, 0.481–0.504, 0.721–0.851 μg/insect. The LD50 values for D. cardinalis and D. superstitiosus were 0.1507, 0.714, 0.798 μg/insect and 0.0991 and 0.824 μg/insect of each of the three chemicals respectively. Based on D. fasciatus from Kibos as the reference strain, the relative susceptibility values of all populations of Dysdercus species studied were small ( < four-fold) indicating that resistance was not apparent in the cotton stainers. Of the three insecticides tested, cypermethrin was the most effective judging from the high toxicity ratios between it, fenvalerate and permethrin.

Résumé

Des études ont été menées sur la sensibilité aux 3 pyrethrinoïdes (cypermethrin, fenvalerate et permethrin) de 4 espèces de Dysdercus (D. fasciatus Sign., D. nigrofasciatus Stal., D. cardinalis Gerst. et D. superstitiosus [F.]) venant de Kenya, en utilisant des colonies d'insectes établies au laboratoire. L'étude de la mortalité, basée sur l'action de contact, a porté sur les nymphes femelles du cinquième stade, âgées de cinq à six jours. Les résultats ont montré que les pyrethrinoïdes de synthèse sont efficaces contre Dysdercus spp. Les LD50 de cypermethrin, fenvalerate et permethrin sont respectivement 0.0656–0.0757, 0.335–0.469 et 0.442–O.505 mg/ml pour D. fasciatus, 0.1690–0.2541, 0.481–0.504 et 0.721–0.851 mg/ml pour D. nigrofasciatus, et 0.1507, 0.714 et 0.798 mg/ml pour D. cardinalis. Cepandant pour D. superstitiosus le DL50 de cypermethrin est 0.0991–0.824 mg/ml. Les résultats ont montrés que l'espèce D. fasciatus est la plus sensible aux trois produits. Parmi les insecticides testés, cypermethrin est le plus efficace alors que les fenvalerate et permethrin montrent leur efficacité dans l'ordre décroissant.

Keywords

Cotton stainersDysdercus spp.susceptibilitysynthetic pyrethroidsPunaise du cotonDysdercus spp.DL50applicateur de microgouttessensibilitépyrethrinoïdes de synthèseaction par contact
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 3 , June 1988 , pp. 309 - 312
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

Anonymous (1978) Annual report, 1978 crop season. Cotton Research Station Kibos, Kenya Ministry of Agriculture.Google Scholar
Anonymous (1984) Annual report, 1984 crop season. Cotton Research Station Kibos, Kenya Ministry of Agriculture.Google Scholar
Busvine, J. R. (1971) A Critical Review of the Techniques for Testing Insecticides. Commonwealth Institute of Entomology, London.Google Scholar
FAO (1969) FAO International collaborative programme for the development of Standard Tests for Resistance of Agricultural Pests to Pesticides. Plant Prot. Bull. 17(4).Google Scholar
La Croix, E. A. S. (1966) Stainer bugs (Dysdercus spp.) in Coast Province, Kenya. Emp. Cott. Grow. Rev. 43, 41–45.Google Scholar
Nyamasyo, G. H. N. and Karel, A. K. (1982) Studies on insecticide resistance in cotton stainers, Dysdercus spp. (Hemiptera: Pyrrhocoridae) in Kenya. Bull. ent. Res. 72, 461–465.CrossRefGoogle Scholar
Pearson, E. O. and Maxwell, D. R. C. (1958) The Insect Pests of Cotton in Tropical Africa. Cotton Research Corporation and Commonwealth Institute of Entomology, London.Google Scholar
Potter, C., Tattersfield, F. and Gillham, E. M. (1947) A laboratory comparison of the toxicity as a contact poison of DDT with nicotine derris products and the pyrethrins. Bull. ent. Res. 37, 469–495.CrossRefGoogle ScholarPubMed
Sawicki, R. M. (1979) Resistance to pesticides: I. Resistance of insects to insecticides. Span 22, 50–52.Google Scholar
Tengecho, B. (1984) The biological performance of Dysdercus cardinalis Gerst. and D. fasciatus Sign. on five different host plants. M. Sc. Thesis. University of Nairobi.Google Scholar