EFFECT OF TEBUFENOZIDE AND DIFLUBENZURON ON SOME BIOLOGICAL ASPECTS OF COTTON LEAFWORM Spodoptera littoralis (BOISD.) COMPARISON WITH CHLORPYRIFOS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 3, Volume 7, Issue 3, March 2016, Page 193-198 PDF (360.77 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2016.50144 | ||||
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| Author | ||||
| E. A. Wahba | ||||
| Plant Protection Research Institute Agricultural Research Center | ||||
| Abstract | ||||
| During summer season, 2014 an experiment was carried out at El-Gemmeiza Agricultural Research Station Gharbia Governorate to evaluate the efficiency and latent effect of chlorpyrifos, tebufenozide, and diflubenzuron on some biological aspects of cotton leafworm Spodoptera littoralis (Boisd.). The efficiency and latent effect proved that these insecticides had high efficiency compared to the control treatment especially for the 4th instar larvae followed with 5th instar and 6th instar ones. Tebufenozide was the most effective compound compared with the other two compounds in suppressing the insect development, while chlorpyrifos recorded the least toxic effect on 6th instar larvae after 15 days from treatment. Tebufenozide affected the development of S. littoralis pupationwhere, zero days of larval feedings treatment recorded zero pupae formation of the 4th, 5th and 6th instar larvae. The highest mortality of pupae was recorded at the 5th day after treatments followed by the 10th day after treatments and finally at 15th day after treatments, for Tebufenozide, diflubenzuron and chlorpyrifos for all instars larvae,respectively.Tebufenozide recorded the highest mortality of pupae. The least moths emergence was recorded with tebufenozide in the 5th day after treatment with no significant differences with diflubenzuron for the 4th instar larvae. The moths emergence increased gradually for the three tested compounds from the 4th to the 5th and the highest in case of the 6th instar larvae. Results showed that all treatments succeeded in reducing the alive instar larvae , high mortality of pupae and less number of moths emergence. Successful results happened to be more promising for the 4th instar larvae than the 5th and 6th instar larvae. | ||||
| Keywords | ||||
| Spodoptera littoralis; instar larvae; pupae; Tebufenozide; Diflubenzuron; chlorpyrifos | ||||
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