Entomophaga

, Volume 21, Issue 3, pp 303–306 | Cite as

Residual toxicity of some common acaricides in Brazil to the predacious miteAmblyseius brazilli

  • E. M. El-Banhawy
Article

Abstract

The direct toxicity of 5 common acaricides toAmblyseius brazilliEl-Banhawy was tested. Omethoate proved to be the most toxic and Chlorobenzilate the least toxic. LC50 were 1.2ppm, 220ppm, 720ppm and 1250ppm for Omethoate, Mexacarbate, Dicofol, Mitran and Chlorobenzilate respectively. The indirect toxicity was also studied by providing the female predators with the phytophagous miteAponicus spinosus (Banks) previously treated by Chlorobenzilate and Mexacarbate. The females were fed on the treated as well as the untreated prey. The eg laying was interrupted and almost stopped in the case of Mexacarbate.

Keywords

Plant Pathology Direct Toxicity Dicofol Residual Toxicity Omethoate 

Résumé

La toxicité directe de 5 acaricides communs surAmblyseius brazilliEl-Banhawy a été examinée. L'Ométhoate est le plus toxique et le Chlorobenzilate le moins toxique. Les CL50 sont respectivement de 1,2ppm, 4,7ppm, 220ppm, 720ppm et 1250ppm pour l'Ométhoate, le Mexacarbate, le Dicofol, le Mitran et le Chlorobenzilate. De même la toxicité indirecte des acaricides a été examinée en fournissant aux prédanteus femelles l'acarien phytophageAponicus spinosus (Banks) traité par le Chlorobenzilate et le Mexacarbate. Les femelles on été nourries de proies traitées et non traitées. La ponte a été interrompue; elle a été presque arrêtée dans le cas du Mexacarbate.

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Copyright information

© Le François 1976

Authors and Affiliations

  • E. M. El-Banhawy
    • 1
  1. 1.Dept. of Parasitology, Inst. of Biomedical SciencesUniversity of Sao PauloBrazil

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