No CrossRef data available.
Article contents
Studies on the residual activity of three synthetic pyrethroids cypermethrin, fenvalerate and permethrin against cotton stainers, Dysdercus spp (Hemiptera: pyrrhocoridae)
Published online by Cambridge University Press: 19 September 2011
Abstract
Studies conducted using laboratory and field bioassays showed that cypermethrin (b = −1.691) had a significantly (P < 0.05) higher and longer residual action at 7,14,21 and 28 days after application than did fenvalerate (b = −2.28) and permethrin (b = −1.871) against Dysdercus fasciatus Sign, and D. nigrofasciatus Stal. when coefficient regression analyses were performed. Residual action of fenvalerate and permethrin was regarded as being identical over the same experimental period in the field since their regression coefficients were not significantly (P > 0.05) different from each other.
It was also shown by these studies that the effective interval between applications was 21 days for cypermethrin and 14 days when fenvalerate and permethrin were applied. This finding has important practical implications in the adoption of an integrated approach aimed at minimizing damage to cotton by D. nigrofasciatus.
Résumé
Apres I'analyse par regression des données sur terrain, le résultats de l'experimentation ont clairement montre que cypermethrine (b =−1.691) a un effet résiduel plus remarquable et qui dure longtemps (mortalité) à 7,14, 21 et 28 jours après I'application, que fenvalerate (b =−2.028) et permethrine (=−1.81) contre Dysdercus fasciatus Sign, et D. nigrofasciatus Stal. L'áction résiduel de fenvalerate et permethrine est consideree être identique, parce que leurs coefficients ne differént pas largement lun de l'áutre (P = 0.05).
L'étude a également montré que la périods intervalle éntre les applications était de 21 jours (fenvalarate et permethrine) tandis que pour le cas de cypermethrine, 14 jours suffisent.
Cette constatation a des implications practiques quant à I'adoption dune approche intégrée ayant I'objetif de minimiser les degats causés par D. fasciatus et D. nigrofasciatus sur le cotton, et en meme temps rendre minime le nombre d'applications de I'insecticide, et ceci egalement a un effet positif sur la qualite de lé environment, conserve les ennemies naturelles des pestes et finalement les fermiers sont en position d obtenir de bons rendements (récoltes optimales).
Keywords
- Type
- Research Articles
- Information
- Copyright
- Copyright © ICIPE 1989
References
REFERENCES
Adam, C.F. (1982) Pest control for small cotton growers: The Hola experiment. Shell Agric. Bull. pp. 4–5.Google Scholar
Anonymous (1980) Annual report of Cotton Research Station, Kibos. Ministry of Agriculture, Kenya.Google Scholar
Anonymous (1982) The 1982 insecticide recommendations for cotton. Circular letter of Senior Kenya Government Entomologist. Ministry of Agriculture, Kenya.Google Scholar
Anonymous (1983) Annual report of Cotton Research Station, Kibos. Ministry of Agriculture, Kenya.Google Scholar
Bohlen, E. (1973) Crop pests in Tanzania and their control. Verlag Paul Parey. Berlin and Hamburg.Google Scholar
Brown, K.J., Rens, G.R., Tveitnes, S. and Aakerbakken, U.N. (1972) Cotton growing recommendations for Kenya. Ministry of Agriculture, Kenya.Google Scholar
Busvine, J.R. and Nash, R. (1953) Evaluation of new contact insecticides. Bull. entomol. Res. 44, 371–376.CrossRefGoogle Scholar
Crowe, T.J. (1967) Cotton pests and their control. Department of Agriculture, Kenya Government.Google Scholar
Geering, Q.A. (1956) A method for controlled breeding of cotton stainers, Dysdercus spp. (Pyrrhocoridae). Bull. entomol. Res. 46, 743–746.CrossRefGoogle Scholar
Hill, D. (1975) Agricultural Insects of the Tropics and Their Control. Cambridge University Press.Google Scholar
Le Pelley, R.H. (1959) Agricultural Insects of East Africa. E.A. High Commission, Nairobi, Kenya.Google Scholar
Mathews, G.A. (1966) Investigations of the chemical control of insect pests of cotton in Central Africa. Bull. entomol. Res. 57, 69–91.CrossRefGoogle Scholar
Mathews, G.A. and Tunstall, J.P. (1968) Scouting and timing of spray applications. Cott. Gr. Rev. 45, 115–127.Google Scholar
Muthamia, J.B. (1971) Cotton pests and their control. Ministry of Agriculture Monograph.Google Scholar
Murega, T.G. and Khaemba, B.M. (1985a) The effect of the infestation by red spider mites, Tetranychus spp. (Acarina: Tetranychidae) attacking cotton in Eastern Kenya. Insect Sci. Applic. 6, 7–11.Google Scholar
Murega, T.G. and Khaemba, B.M. (1985b) Evaluation of some chemicals for efficacy against red spider mites, Tetranychus spp. (Acarina: Tetranychidae) attacking cotton in Eastern Kenya. Insect Sci. Applic. 6, 11–15.Google Scholar
Pearson, E.O. and Maxwell, D. R. C. (1958) The insect pests of cotton in tropical Africa. Cott. Res. Corp. and Commonwealth Institute of Entomology, London.Google Scholar
Tengecho, B. (1984) The biological performance of Dysdercus cardinalis Gerst and Dysdercus fasciatus Signoret (Hemiptera: Pyrrhocoridae) on five different host plants. M.Sc. thesis, University of Nairobi.Google Scholar
Tunstall, J.P. and Mathews, G.A. (1966) Large scale spraying trials for the control of cotton pests in Central Africa. Emp. Cott. Gr. Rev. 43, 121–139.Google Scholar
Ware, G.W. (1978) Pesticides: Theory and Application. W.H. Freeman and Company, San Fransisco.Google Scholar
Rens, G.R. (1977) Cotton pests of Kenya. Ministry of Agriculture. Monograph, Kenya Government.Google Scholar
Schmutterer, H. (1969) Pests of Crops in Northeast and Central Africa. Gustav. Springer Verlag, Stuttgart. pp. 66–72.Google Scholar