Insecticidal Effect of Bacillus thuringiensis var Kurstaki on the Various Instars Larvae of Plutellax ylostella L. (Lep.: plutellidae) Under Laboratory Condition | ||||
| Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
| Article 4, Volume 3, Issue 1, December 2011, Page 27-32 PDF (53.19 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsf.2011.17434 | ||||
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| Authors | ||||
| Shaban Ranjbari1; Mohammad Hassan Safaralizadeh2; Shahram Aramideh3 | ||||
| 1Department of Plant Protection, University of Urmia, Iran | ||||
| 2Department of Plant Protection, University of Urmia, Iran | ||||
| 3Department of Plant Protection, University of Urmia, Iran | ||||
| Abstract | ||||
| Due to economic importance of diamondback moth pest and resistance to conventional insecticides, it is necessary to use novel and suitable compounds in control programs. Therefore, we evaluated the toxicity of Bacillus thuringiensis to four instars larvae of diamondback moth, Plutella xylostella (L.). In this study 1st, 2nd, 3rd and 4th instars larvae were exposed to different concentrations of Bacillus thuringiensis. The exposure times were 24, 48 and 72 h for oral trials. Experiments were performed in complete randomized block design with four replications. After treatment the samples were held under constant conditions in laboratory rearing room (25±2oC, 50±5% RH and 14 and 10 hrs. L: D photoperiod). The maximum mortality rate for 1st, 2nd, 3rd and 4th instars larvae in 90, 140, 200 and 250 ppm of Bacillus thuringiensis was achieved 98.33, 97.67, 96.67 and 90% after 72 h, respectively. Our results suggest Bacillus thuringiensis could be an important agent in control of larval instars of Plutella xylostella. | ||||
| Keywords | ||||
| Bacillus thuringiensis; Bioassay; cabbage; Plutella xylostella | ||||
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