Laboratory studies to evaluate the difference in the toxic effects of three biopesticides on the two ladybird predators Coccinellaundecimpunctata L. and HippodamiaconvergensGuer.(Coleoptera : Coccinellidae), reared on an artificial diet. | ||||
Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
Article 5, Volume 9, Issue 2, September 2017, Page 29-38 PDF (370.32 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/eajbsf.2017.17046 | ||||
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Authors | ||||
Esmat A. Kares; IsmaiI A. Bahy El-Din; Mohamed A. M. Ali; Mostafa A.M. El-Khawas | ||||
Biological Control Research Dept., Plant Protection Research Institute, A.R.C., Dokki, Giza, Egypt | ||||
Abstract | ||||
Laboratory studies were conducted to evaluate the toxic effects of three different treatments: the bioinsecticide Biovar (containing the fungus Beauveria bassiana), Andros (an Abamectin derivative) and Radiant (a Spinosad derivative) on the two ladybird beetles; Coccinella undecimpunctata and Hippodamia convergens, that were reared on a laboratory artificial diet. The LC50 values obtained for the ladybird beetle C. undecimpunctata were; 2.9608×105 viable spores, 0.8003% and 0.3142%. The corresponding LC50 values obtained for the ladybird beetle H. convergens were; 3.8659×105 viable spores, 0.8065% and 0.3987%, for the three biopesticides Biovar, Andros and Radiant, respectively. The mortality percentages were higher in case of the ladybird beetle, C. undecimpunctata comparing with the ladybird beetle, H. convergens. As, the concentrations of each treated compounds increased, the mortality percentages were also increased. Therefore, using the fungal biofungicide; Biovar and the natural pesticide Andros may be recommended to be applied, for giving more safety on the two previous predatory species especially by using them at low concentrations rates. They could be used side by side with other available safe control methods, within Integrated Pest Management (IPM) strategies, to protect man and natural enemies including predators and also his surrounding environment from pollution. | ||||
Keywords | ||||
biopesticides; Toxic effects; ladybird predators; Coccinella undecimpunctata; Hippodamia convergens; artificial diet; laboratory conditions | ||||
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