Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).
Abdel-Aal, A., A., E. (2012). Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).. EKB Journal Management System, 4(1), 61-68. doi: 10.21608/eajbsf.2012.17285
Aziza E. Abdel-Aal; El- Shikh T. A.. "Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).". EKB Journal Management System, 4, 1, 2012, 61-68. doi: 10.21608/eajbsf.2012.17285
Abdel-Aal, A., A., E. (2012). 'Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).', EKB Journal Management System, 4(1), pp. 61-68. doi: 10.21608/eajbsf.2012.17285
Abdel-Aal, A., A., E. Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).. EKB Journal Management System, 2012; 4(1): 61-68. doi: 10.21608/eajbsf.2012.17285

Efficiency of Diple 2x ((Bacillus thuringiensis var. kurstaki) alone and its mixture with two insecticides against the Egyptian cotton leaf worm Spodoptera littoralis (Lepidoptera: Noctuidae).

Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control
Article 6, Volume 4, Issue 1, December 2012, Page 61-68  XML PDF (166.14 K)
Document Type: Original Article
DOI: 10.21608/eajbsf.2012.17285
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Authors
Aziza E. Abdel-Aal; El- Shikh T. A.
Plant Prot. Res. Inst., Agric. Res. Cent., Dokki, Giza, Egypt
Abstract
The Efficiency of the bioinsecticide, Diple 2x (Bacillus thuringiensis) alone and its mixtures with two insecticides on cotton leafworm Spodoptera littoralis (Boisd) was investigated. Data indicated that Lufenuron was the highest effective insecticides against both the 2nd and the 4th instar larvae of S. littoralis followed by Methomyl and B.t , respectively .All tested mixtures decreased the toxicity according to Co-Toxicity factor ,the tested mixture (B.t + Lufenuron) gave the high level of antagonism effect followed by the mixture (B.t + Methomyle). The field efficiency of tested insecticides (when used singular) can be arranged according to the general mean of reduction percentage during two seasons in a descending order as follows: Lufenuron, Methomyle and B.t. The addition of B.t. to Lufenuron gave raising the general mean of reduction percentage during two seasons in contrast the other tested insecticide gave a reduction but less than when applied without added to Bt. The same trend of effects were obtained when applied the two tested insecticides at the half recommended rate alone or mixed with the same dose of Bt on S. littoralis but with less level of reduction in case of (Bt+Lufenuron) mixture.Also the three toxicants affected the Chitinase ,prptease and acetycholinesterase enzymes.
Keywords
Bacillus thuringiensis var; Spodoptera littoralis
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