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Rainfastness and Efficacy of Spray Deposits of Cypermethrin on Neonate Codling Moth Larvae, Cydia pomonella

Published online by Cambridge University Press:  19 September 2011

Kwame Afreh-Nuamah
Kwame Afreh-Nuamah
Affiliation:
International Pesticide Application Research Centre, Imperial College at Silwood Park, Ascot, Berkshire
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Abstract

Seedlings of apple variety, Yarlington mill, were sprayed with different sprays containing 0.1% cypermethrin, and were subjected for 15 min to 65.3 mm artificial rainfall. The effectiveness of deposits after rainfall were tested in the laboratory with neonate codling moth larvae.

Cypermethrin formulations sprayed with each nozzle were more persistent after artificial rain, when small droplets of volume median diameter (VMD = 30–70 μm) were applied by spinning discs (charged or uncharged) compared with larger droplets (VMD* = 90–160 μm) produced by air shear nozzle. No significant difference in effects was obtained between droplets by either charged or uncharged disc.

Résumé

Plantules du pomme variété Yarlington mill ont été pulvérisés par des pulvérisants différents contenant 0.1 pourcent de cypermethrin. Quelques plantules pulvérisés ont été choisies au hassard et exposées pendant 15 minutes à une pluie artificielle de 65.3 mm.

Des feuilles ont été prises au hassard de chaque groupe de plantule (avec et sans pluie) et les effets de retenu deposé ont été testé au laboratoire avec Cydia pomonella larve.

Formulations de cypermethrin pulvérisé par chaque bec ont été plus persistants aprés la pluie artificielle; quand des petites goutteiettes (VMD = 30–70 μm) ont été appliquées gouttelettes (VMD = 90–160) μm produites par bec air tondu.

Pas de difference significante n' a été obtenu entre gouttelettes par soit disque roulant.

Keywords

Rainfastnessspraycypermethrinartificial raincodling mothformulations
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 5 , October 1988 , pp. 583 - 585
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

Boize, L., Gudin, C. and Purdue, G. (1976) The influence of leaf roughness on the spreading of oil spray droplets. Ann. Appl. Biol. 84, 205–211.CrossRefGoogle Scholar
Brunskill, R. T. (1956) Factors affecting the retention of spray droplets on leaves. Proc. 3rd Br. Weed com. confr. 2, 593–603.Google Scholar
Courshee, R. J. (1967) Application and use of foliar fungicides. In Fungicides: An Advanced Treatise (Edited by Torgeson, D. C.), vol. 1. pp. 239–286. Academic Press, New York.Google Scholar
Hartley, G. S. and Graham-Bryce, I. J. (1980) Physical Principles of Pesticide Behaviour, vol. 2. London, Academic Press.Google Scholar
Holloway, P. J. (1970) Surface factors affecting the wetting of leaves. Pestic. Sci. 1, 165–173.CrossRefGoogle Scholar
Mabbert, T. H. and Phelps, R. H. (1983) The behaviour of copper deposits from reduced volume sprays and their control of citrus greasy spot. Trop. Pest Manage. 29, 137–144.CrossRefGoogle Scholar
Maas, W. (1971) ULV Application and Formulation Tecniques. Eindhoven, N. V. Phillips Gloeilampenfabriken.Google Scholar
Matthews, G. A. (1966) Investigation of the Chemical Control of Insect Pests of Cotton in Central Africa. Bull. Ent. Res. 57, 77–91.CrossRefGoogle Scholar
Matthews, G. A. (1982) Pesticide Application in the Tropics. Proc. Int. Plant Prot. in Tropics, 671–679.Google Scholar
Pick, F. E., Van Dyke, L. P. and De Beer, P. R. (1984) The effect of simulated rain on deposits of some cotton pesticides. Pestic. Sci. 15, 616–623.CrossRefGoogle Scholar
Polles, S. G. and Vinson, S. B. (1969) The effect of droplet size on the persistence ultra low volume malathion. J. Econ. Ent. 62, 89.Google Scholar
Sandhu, G. S. and Singh, H. (1977) Influence of simulated rain and dew on the persistent toxicity of some insecticides on cotton jassid Amrasca biguttula on cotton. Indian J. Plant Prot. 5, 131–143.Google Scholar
Simmons, R. C. (1980) Properties of natural rainfall and their simulation in the laboratory for pesticide research. Technical Report No. 60. Weed Research Organisation, Yarnton, Oxford.Google Scholar
Taylor, N. and Matthews, G. A. (1986) Effect of different adjuvants on the rainfastness of bendiocarb applied to brussels sprout plants. Crop Prot. 5, 250–253.CrossRefGoogle Scholar