Nor Hidawati Elias
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Nor Hidawati Elias
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Nor Hidawati, Elias
Alternative Name
Elias, Nor H.
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Scopus Author ID
56808970800

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  • Publication
    Bioinsecticidal Activity of Roots and Leaves Extract of Cymbopogon citratus on Sitophyluz oryzae
    (Universiti Malaysia Perlis, 2024-12-02)
    Nurhadijah Zainalabidin
    ;
    Muhamad Ikmal Sirozi
    ;
    Nor Hidawati Elias
    Sitophilus oryzae is a storage pest of serious concern nowadays, which causes various losses by destroying large quantities of grains, legumes, and other food materials. Several methods have been utilized to overcome the infestation of this pest, including synthetic pesticides. However, this method somehow negatively impacted the surroundings, especially the non-targeting organism. Thus, biopesticides safe to nature and ecosystems can be applied as an alternative. The aim of this research was to study the bioinsecticidal activities of Cymbopogon citratus leaves and root extract against Sitophilus oryzae. The bioinsecticidal activity was assessed through repellency tests, contact activity, and phytochemical analysis. Roots and leaves were extracted using solvents such as ethanol, methanol, and chloroform. Extract concentration was varied to 50, 100, 150, and 200 ppm for repellency and contact activity tests. Based on the data obtained, it was best described that ethanolic extract of C. citratus root shows the highest repellency of 100% after 5 h exposure to 200 ppm extract concentration with a mean repellency of 80.7%. Both ethanolic extract of C. citratus root and leaves at 200 ppm show 100% mortality of S. oryzae after 24 h exposure. Based on phytochemical screening, saponin, phenols, and tannins were detected in both the root and leaves of C. citratus, which might be possible to contribute in the bioinsecticidal activity.
      21  1
  • Publication
    Insecticidal activity of Kaffir Lime (Citrus hystrix) against Rice Weevil (Sitophylus oryzae)
    ( 2024-03)
    Adila Fazliyana Aili Hamzah
    ;
    Nurhadijah Zainalabidin
    ;
    Nor Hidawati Elias
    The aim of this study is to analyze the potential use of kaffir lime leaves and peel extract as bioinsecticides against rice weevils. The assessment of bioinsecticidal activity was studied through contact activity, repellency, antifeedant, and progeny and growth development tests. Contact activity tests resulted in increased adult mortality with increased extract concentrations from 10 to 50 mg/L after 24 hours. The leaf extract (LC50=18 mg/L) showed a higher mortality rate compared to fruit peel extracts (LC50=54 mg/L), with 100 % and 60 % mortality, respectively. The leaf extracts with a mean repellency of 68 % significantly repelled rice weevils compared to the 42 % repellency of fruit peel extracts. The leaf extract was classified in repellency class IV, while the peel extract was in repellency class II. With the use of Kaffir lime leaf extracts, F1 adults were completely suppressed at 20 mg/L concentration of leaf extract with a 100 % inhibition rate.
      1  17