Hostname: page-component-76fb5796d-skm99 Total loading time: 0 Render date: 2024-04-28T15:25:50.571Z Has data issue: false hasContentIssue false
  • English
  • Français

The concentration of lamdacyhalothrin and its effect on the cutworm Agrotis segetum (Lepidoptera: Noctuidae)

Published online by Cambridge University Press:  10 July 2009

B.W. Blair
B.W. Blair*
Affiliation:
Tobacco Research Board, Harare, Zimbabwe
*
Dr B.W. Blair, Tobacco Research Board, P.O. Box 1909, Harare, Zimbabwe.
Get access Rights & Permissions [Opens in a new window]

Abstract

During initial screening of the synthetic pyrethroid lamdacyhalothrin (PP 321) at a concentration of 44 and 22 mg/l and applied as a 30 ml drench over each plant against third to fourth instar cutworms, Agrotis segetum (Denis & Schiffermüller) in microplots, few died but they did not damage the plants. Reducing the concentrations to 11 and 5.5 mg/l increased mortality and plant damage. When A. segetum were confined on soil treated with the insecticide at concentrations of 22, 11 and 5.5 mg/l and sprayed at an equivalent rate of 500 l/ha, they all died within one day. The higher concentrations appeared to have a repellent and/or antifeedant effect, and it has been possible to reduce the concentration of lamdacyhalothrin to 12.5 mg/l (≡5.6g a.i./ha) for the drench treatment without risking economic plant damage. For insecticides that have repellent and/or antifeedant properties, it should be possible to balance lower concentrations with adequate protection of plants from pest damage.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 81 , Issue 2 , June 1991 , pp. 143 - 145
Copyright
Copyright © Cambridge University Press 1991

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

Anon. (1984) Technical data: KARATE insecticide (PP 321). 20 pp. Haslemere, Surrey, UK, Imperial Chemical Industries, Plant Protection Division.Google Scholar
Blair, B.W. (1986) Use of microplots to test the efficacy of insecticides against cutworms, Agrotis spp. Proceedings CORESTA Symposium, Taormina (Sicily), Italy, 10 1986, pp. 366–367.Google Scholar
Gist, G.L. & Pless, CD. (1985) Feeding deterrent effects of synthetic pyrethroids on the fall armyworm, Spodoptera frugiperda. Florida Entomologist 68, 456–461.Google Scholar
Hall, R.R. (1979) Effects of synthetic pyrethroids on major insect and mite pests of apple. Journal of Economic Entomology 72, 441–446.Google Scholar
Ruscoe, C.N.E. (1977) The new NRDC pyrethroids as agricultural insecticides. Pesticide Science 8, 236–242.Google Scholar
Shorey, H.H. & Hale, R.H. (1965) Mass-rearing of the larvae of nine noctuid species on a simplified artificial medium. Journal of Economic Entomology 58, 522–524.Google Scholar
Tan, K.H. (1981) Antifeeding effect of cypermethrin and permethrin at sub-lethal levels against Pieris brassicae larvae. Pesticide Science 12, 619–626.Google Scholar
Tobacco Research Board (1990) Flue-cured Recommendations. Section I: Insect and mite pest control. 19 pp. Harare, Zimbabwe. (Loose-leaf binder).Google Scholar