BIOACTIVITY OF LEMON EXTRACTS ON THE COTTON LEAFWORM, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) I- ANTIFEEDANT EFFECT OF LEMON LEAF EXTRACTS AGAINST S.littoralis larvae. | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 5, Volume 23, Issue 2, July 2009, Pages 47-54 PDF (279.6 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2009.197057 | ||
| Authors | ||
| Ahmed A.M. Etman; Ibrahim H.H. Ali | ||
| Department of Plant Protection, El-Fayoum Faculty of Agriculture, University of Fayoum, Egypt | ||
| Abstract | ||
| Five lemon leaf extracts were tested as antifeedants for the cotton leafworm, Spodoptera littoralis (Boisduval), where Chloroform, methanol, carbontetrachloride, ether and n-hexane were used. In choice tests; where larvae were offered treated and un-treated cotton leaf discs, extracts of the three latter solvents were very effective on 3rd instar larvae. The chloroform extract was effective, while the methanol extract had no such effect. In nonchoice tests; where larvae were offered only treated cotton leaf discs, more than 97.0% feeding inhibition was observed with chloroform (weakly polar); 98.6, 83.0 and 95.7% for carbontetrachloride, ether, and n-hexane, (non-polar), respectively. These results indicate that Citrus limon L. leaves contain chemicals that serve as antifeedants for S.littoralis larvae | ||
| Keywords | ||
| Spodoptera littoralis; lemon extracts and Antifeedant effect | ||
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