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EFFECT OF TEMPERATURE ON THE TOXICITY OF CYPERMETHRIN TO NYMPHS OF THE MIGRATORY GRASSHOPPER, MELANOPLUS SANGUINIPES (ORTHOPTERA: ACRIDIDAE)1

Published online by Cambridge University Press:  31 May 2012

A. B. Ewen ,
M. K. Mukerji  and
C. F. Hinks
A. B. Ewen
Affiliation:
Research Station, Agriculture Canada, Saskatoon, Saskatchewan S7N 0X2
M. K. Mukerji
Affiliation:
Research Station, Agriculture Canada, Saskatoon, Saskatchewan S7N 0X2
C. F. Hinks
Affiliation:
Research Station, Agriculture Canada, Saskatoon, Saskatchewan S7N 0X2
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Abstract

Cypermethrin was tested at nine dosages from 2 to 72 g AI/ha and at five temperatures from 15 °to 35 °C against second-instar nymphs of a non-diapause strain of the migratory grasshopper, Melanoplus sanguinipes (Fab.). At lower dosages, mortality increased with increasing temperatures from 15 °to 30 °C and then leveled off. At dosages of 12 g AI/ha or higher, mortality increased slightly with increasing temperature from 15 °to 20 °C, then declined at higher temperatures. Cypermethrin was about 2.2 times less toxic (LD50) at 35 °C than at 15 °or 20 °C and 70% of this reduction in toxicity occurred above 25 °C. Thus, the toxicity of cypermethrin was negatively correlated with temperature above 20 °C for nymphs of the migratory grasshopper.

Résumé

On a testé la cyperméthrine à neuf doses de 2 à 72 g de m.a./ha et à cinq températures de 15 à 35 °C contre les nymphes de 2e stade d'une lignée sans diapause du petit criquet voyageur, Melanoplus sanguinipes. Aux faibles doses, la mortalité augmente avec l'élévation des températures de 15 à 30 °C et atteint ensuite un plateau. Aux doses de 12 g de m.a./ha ou plus, la mortalité augmente légèrement avec la température de 15 à 20 °C, pour ensuite régresser aux températures plus élevées. La cyperméthrine est environ 2.2 fois moins toxique (DL50) à 35 °C qu'à 15 ou 20 °C et 70% de cette baisse de toxicité survient au-dessus de 25 °C. La toxicité de la cyperméthrine est donc négativement corrélée à la température au-dessus de 20 °C pour les nymphes du petit criquet voyageur.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 9 , September 1984 , pp. 1153 - 1156
Copyright
Copyright © Entomological Society of Canada 1984

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References

Chalfant, R. B. 1973. Cabbage looper: effect of temperature on the toxicity of insecticides in the laboratory. J. econ. Ent. 66: 339–341.CrossRefGoogle Scholar
Finney, D. J. 1971. Probit Analysis, 3rd ed. Cambridge Univ. Press. 333 pp.Google Scholar
Harris, C. R. and Kinoshita, G. B.. 1977. Influence of posttreatment temperature on the toxicity of pyrethroid insecticides. J. econ. Ent. 70: 215–218.CrossRefGoogle Scholar
Hirano, M. 1979. Influence of posttreatment temperature on the toxicity of fenvalerate. Appl. Ent. Zool. 14: 404–409.CrossRefGoogle Scholar
McKinlay, K. S. 1965. Note on the effects of temperature and piperonyl butoxide on the toxicity of carbaryl to adult grasshoppers. Can. Ent. 97: 827–829.CrossRefGoogle Scholar
McKinlay, K. S. and Martin, W. K.. 1967. Effects of temperature and piperonyl butoxide on the toxicity of six carbamates to the grasshopper Melanoplus sanguinipes (= M. bilituratus). Can. Ent. 99: 748–751.CrossRefGoogle Scholar
Mukerji, M. K. and Ewen, A. B.. 1983. Field evaluation of cypermethrin and carbaryl as sprays and baits for grasshopper (Orthoptera: Acrididae) control in Saskatchewan. Can. Ent. 116: 5–9.CrossRefGoogle Scholar
Norment, B. R. and Chambers, H. W.. 1970. Temperature relationships in organophosphorus poisoning in boll weevils. J. econ. Ent. 63: 502–504.CrossRefGoogle Scholar
Pickford, R. and Randell, R. L.. 1969. A non-diapause strain of the migratory grasshopper, Melanoplus sanguinipes (Orthoptera: Acrididae). Can. Ent. 101: 894–896.CrossRefGoogle Scholar
Sparks, T. C., Shour, M. H., and Wellemeyer, E. G.. 1982. Temperature-toxicity relationships of pyrethroids on three lepidopterans. J. econ. Ent. 75: 643–646.CrossRefGoogle Scholar
Thompson, J. L., McKinlay, K. S., and McDonald, H.. 1969. A laboratory sprayer. Can. Agric. Engng 11: 20–22.Google Scholar