CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.)
Larva of cotton leaf worm, Spodoptera littoralis ate and digested an average of 13.79 and 10.82g, respectively of untreated castor bean leaves during its whole sixth instar. These amounts significantly reduced when larvae were fed on leaves treated with different concentrations of neem seed kernel m...
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| Format: | Article |
| Language: | Arabic |
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The Union of Arab Universities
2010-03-01
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| Series: | Arab Universities Journal of Agricultural Sciences |
| Subjects: | |
| Online Access: | https://ajs.journals.ekb.eg/article_15000_d44e4fdb7e5b0a39b89a2f1ce8e21cc4.pdf |
| _version_ | 1827323459881926656 |
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| author | R.M.H Tagour , H.A. Gomaa G.M Abd El-Hamed |
| author_facet | R.M.H Tagour , H.A. Gomaa G.M Abd El-Hamed |
| author_sort | R.M.H Tagour |
| collection | DOAJ |
| description | Larva of cotton leaf worm, Spodoptera littoralis ate and digested an average of 13.79 and 10.82g, respectively of untreated castor bean leaves during its whole sixth instar. These amounts significantly reduced when larvae were fed on leaves treated with different concentrations of neem seed kernel methanolic extract. The reduction was concentration dependent, i.e., an increase in neem extract concentration caused an obvious decrease in the amount of ingested or digested leaves. The consumption and digestion indices are always negative indicating that treated castor bean leaves are not preferred by S. littoralis larvae for feeding. These indices decreased as the concentrations of neem extract increased. Approximate digestibility in S. littoralis sixth instar larvae averaged 78.50%. This percentage insignificantly fluctuated between 77.71 and 81.08% when larvae were fed on castor bean leaves treated with different concentrations of neem extract. Efficiencies of conversion of ingested and digested food to body substances (ECI and ECD) are an overall indicators for ability of S. littoralis larvae to utilize ingested and digested food for growth and food storage in the insect. Such values depend upon the food digestibility, its nutritional values and the ingestion rates. ECI and ECD in larvae fed on untreated leavesreached 22.25 and 28.25%, respectively. These values decreased after feeding the larvae on treated leaves. The decrease was gradually occurred as the concentration of neem extract increased to reach the minimum value at the highest concentration (0.025%). |
| first_indexed | 2024-04-25T01:52:06Z |
| format | Article |
| id | doaj.art-8249d9e6697b404ab6319c6733ba72fc |
| institution | Directory Open Access Journal |
| issn | 1110-2675 2636-3585 |
| language | Arabic |
| last_indexed | 2024-04-25T01:52:06Z |
| publishDate | 2010-03-01 |
| publisher | The Union of Arab Universities |
| record_format | Article |
| series | Arab Universities Journal of Agricultural Sciences |
| spelling | doaj.art-8249d9e6697b404ab6319c6733ba72fc2024-03-07T17:45:26ZaraThe Union of Arab UniversitiesArab Universities Journal of Agricultural Sciences1110-26752636-35852010-03-0118120521210.21608/ajs.2010.1500015000CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.)R.M.H Tagour0, H.A. Gomaa1G.M Abd El-Hamed2- Weed Research Laboratory1- Department of Plant Protection, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt- Weed Research LaboratoryLarva of cotton leaf worm, Spodoptera littoralis ate and digested an average of 13.79 and 10.82g, respectively of untreated castor bean leaves during its whole sixth instar. These amounts significantly reduced when larvae were fed on leaves treated with different concentrations of neem seed kernel methanolic extract. The reduction was concentration dependent, i.e., an increase in neem extract concentration caused an obvious decrease in the amount of ingested or digested leaves. The consumption and digestion indices are always negative indicating that treated castor bean leaves are not preferred by S. littoralis larvae for feeding. These indices decreased as the concentrations of neem extract increased. Approximate digestibility in S. littoralis sixth instar larvae averaged 78.50%. This percentage insignificantly fluctuated between 77.71 and 81.08% when larvae were fed on castor bean leaves treated with different concentrations of neem extract. Efficiencies of conversion of ingested and digested food to body substances (ECI and ECD) are an overall indicators for ability of S. littoralis larvae to utilize ingested and digested food for growth and food storage in the insect. Such values depend upon the food digestibility, its nutritional values and the ingestion rates. ECI and ECD in larvae fed on untreated leavesreached 22.25 and 28.25%, respectively. These values decreased after feeding the larvae on treated leaves. The decrease was gradually occurred as the concentration of neem extract increased to reach the minimum value at the highest concentration (0.025%).https://ajs.journals.ekb.eg/article_15000_d44e4fdb7e5b0a39b89a2f1ce8e21cc4.pdf: consumptionutilization of foodcastor bean leavesneem seed kernelmethanol extractspodoptera littoralis (boisd.) |
| spellingShingle | R.M.H Tagour , H.A. Gomaa G.M Abd El-Hamed CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) Arab Universities Journal of Agricultural Sciences : consumption utilization of food castor bean leaves neem seed kernel methanol extract spodoptera littoralis (boisd.) |
| title | CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) |
| title_full | CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) |
| title_fullStr | CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) |
| title_full_unstemmed | CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) |
| title_short | CONSUMPTION AND UTILIZATION OF CASTOR BEAN LEAVES TREATED WITH NEEM SEED KERNEL EXTRACTS BY THE COTTON LEAF WORM LARVAE, Spodoptera littoralis (Boisd.) |
| title_sort | consumption and utilization of castor bean leaves treated with neem seed kernel extracts by the cotton leaf worm larvae spodoptera littoralis boisd |
| topic | : consumption utilization of food castor bean leaves neem seed kernel methanol extract spodoptera littoralis (boisd.) |
| url | https://ajs.journals.ekb.eg/article_15000_d44e4fdb7e5b0a39b89a2f1ce8e21cc4.pdf |
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