Influence of insect growth regulator, BAY SIR 8514, on chitin synthesis and degradation of Spodoptera littoralis (Lepidoptera: Noctuidae)
نویسنده
چکیده
The present study has been conducted to investigate the effect of insect growth regulator BAY SIR 8514 on chitin and chitinase enzymes of 2 in star of Spodoptera littoralis larvae, the effect of sublethal doses, LC 25, LC 50 and LC90 shows a significant effect on antifeedant index, on the other hand larval treatment with the tested IGR doses revealed, certain histo-pathological symptoms such as (1) diorganisation, disintegration and vacuolization of oocytes and sperms. Insect treated with LC25 protein was found to have the highest number of bands (13 bands), while those treated with LC50 was found to have the lowest number (6 bands). The variability analysis of normal and treated insects showed some variations. Insects treated with LC25 showed 4 monomerphic and 11 unique bands, those treated with LC50 showed 4 monomerphic and 12 unique bands, those treated with LC90 showed 5 monomerphic and 5 unique. [Najat A. Khatter. Influence of insect growth regulator, BAY SIR 8514, on chitin synthesis and degradation of Spodoptera littoralis (Lepidoptera: Noctuidae). J Am Sci 2015;11(9):80-86]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 11
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