Bioactivities of orange peel extracts against the larvae of Spodoptera litura Fab. and Spodoptera exigua Hüb
The effects of peel ethanol extracts from Citrus unshiu on the larvae of Spodoptera litura Fab. and Spodoptera exigua Hüb. were preliminarily investigated in laboratory by measuring antifeedant index, body weight gains and mortality of the larvae after their feeding on the cabbage leaves coated with...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2005-01-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2005.01.0076 |
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| Summary: | The effects of peel ethanol extracts from Citrus unshiu on the larvae of Spodoptera litura Fab. and Spodoptera exigua Hüb. were preliminarily investigated in laboratory by measuring antifeedant index, body weight gains and mortality of the larvae after their feeding on the cabbage leaves coated with the extract. The results indicated that the cabbage leaf consumption and body weight gains were both reduced, and the larval mortality was increased after the larvae had fed on the leaves coated with the extract. The higher the concentration, the more obvious the effect on the pests was. The larval mortality of S. exigua was higher than that of S. litura at the same extract concentration. Both the median inhibitory concentration (IC<sub>50</sub>) and the median antifeedant concentration (AFC<sub>50</sub>) in the nonchoice test for S. exigua were lower than those for S. litura. However, the AFC<sub>50</sub> in the choice test was higher for S. exigua than for S. litura. The overall results indicated that the bioactivities of peel ethanol extract from Citrus unshiu against S. exigua are better than against S. litura. |
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| ISSN: | 1008-9209 2097-5155 |