Articles
EFFECTIVENESS OF EXTRACT OF CALOTROPIS PROCERA ON NUTRITIONAL INDICES OF TRIBOLIUM CONFUSUM DUV.
Article number
940_92
Pages
669 – 672
Language
English
Abstract
Plants offer an excellent source of biologically active natural products.
Experiments were carried out to evaluate the alcoholic and watery extract of Calotropis procera on Tribolium confusum Duv.
Insecticide property was done by disk method of bioassay under controlled condition, at 27±°C and 70-80% RH. Several concentrations of each extract (30, 60, 90, 120 µl/disk) were prepared as well as a control.
Nutritional indices, namely relative growth rate (RGR), relative consumption rate (RCR), efficacy of conversion of ingested food (ECI) and feeding deterrent index (FDI), were measured.
The experiments in the laboratory were done in completely randomized design with 5 replications.
Data were analyzed one-way ANOVA and means compared with Duncans multiple ranges test.
Results showed that C. procera alcoholic extracts at the concentration of 90 µl/disk and 120 µl/disk significantly decreased the RGR and RCR (P<0.05). There was no significant difference between treatments at 30 µl/disk, meanwhile significant differences were detected between treatments at 60, 90 and 120 µl/disk and 30 µl/disk on RCR (P<0.05). The most decreased effectiveness of extract on RCR was at the concentration of 120 µl/disk (about 0.0119 mg/day). The extract in 60 µl/disk increased the ECI significantly (about 61%) as compared with other extracts.
However, FDI was significantly increased with high concentrations; there were not any significant differences among 30 µl/disk with control extracts.
Moreover, C. procera had the most effective on FDI and increased it up to 83.3%.
Experiments were carried out to evaluate the alcoholic and watery extract of Calotropis procera on Tribolium confusum Duv.
Insecticide property was done by disk method of bioassay under controlled condition, at 27±°C and 70-80% RH. Several concentrations of each extract (30, 60, 90, 120 µl/disk) were prepared as well as a control.
Nutritional indices, namely relative growth rate (RGR), relative consumption rate (RCR), efficacy of conversion of ingested food (ECI) and feeding deterrent index (FDI), were measured.
The experiments in the laboratory were done in completely randomized design with 5 replications.
Data were analyzed one-way ANOVA and means compared with Duncans multiple ranges test.
Results showed that C. procera alcoholic extracts at the concentration of 90 µl/disk and 120 µl/disk significantly decreased the RGR and RCR (P<0.05). There was no significant difference between treatments at 30 µl/disk, meanwhile significant differences were detected between treatments at 60, 90 and 120 µl/disk and 30 µl/disk on RCR (P<0.05). The most decreased effectiveness of extract on RCR was at the concentration of 120 µl/disk (about 0.0119 mg/day). The extract in 60 µl/disk increased the ECI significantly (about 61%) as compared with other extracts.
However, FDI was significantly increased with high concentrations; there were not any significant differences among 30 µl/disk with control extracts.
Moreover, C. procera had the most effective on FDI and increased it up to 83.3%.
Authors
N. Farrar, S.R. Golestaneh, M.T. Farsi, S.M. Sadeghi, H. Askari
Keywords
Calotropis procera, Tribolium confusum, RCR, RGR, ECI, FDI
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