| Sains Malaysiana 48(9)(2019):
          1919–1926
  
         http://dx.doi.org/10.17576/jsm-2019-4809-13 
                
             
           Evaluation of in vitro 
              Bioactivity of Melaleuca cajuputi Powell Essential Oil 
              against Aedes aegypti (L.) and Aedes albopictus (Skuse) 
                (Penilaian Bioaktiviti 
              in vitro Minyak Pati Melaleuca cajuputi Powell terhadap 
              Aedes aegypti (L.) dan Aedes albopictus (Skuse)  
               
             
           AZLINDA ABU BAKAR1*, HAMDAN AHMAD2, SALLEHUDIN SULAIMAN, BAHARUDIN OMAR
  & RASADAH MAT ALI
  
           
             
           1Department
            of Medical Microbiology & Parasitology, School of Medical Sciences,
            Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan Darul Naim, Malaysia
  
           
             
           2Vector
            Control Research Unit, School of Biological Sciences, 11800 USM, Minden Pulau
            Pinang, Malaysia
            
           
             
           Diserahkan:
            4 Februari 2019/Diterima: 13 Jun 2019
            
           
             
           ABSTRACT
            
           The aim of this study 
              was to evaluate the in vitro activity of Melaleuca 
              cajuputi essential oil leaf extract against Aedes aegypti 
              and Aedes albopictus. The essential oil of the M. 
              cajuputi was obtained via steam hydro-distillation and analyzed 
              by GC-MS for the chemical constituents. 
              GC-MS 
              analysis showed that the essential oil of M. 
              cajuputi contained 13 compounds with two major chemical constituents, 
              2-propenoic acid (29.55%) and caryophyllene (20.04%). Adulticidal 
              and larvicidal bioassay was evaluated following WHO 
              guidelines. Larvicidal bioassays were conducted with 
              the 10, 50, 80, 100, and 120 mg/L M. cajuputi essential oil 
              against late 3rd instar of Ae. aegypti and 
              Ae. albopictus which give LC50 120.99 mg/L and 222.58 mg/L, 
              respectively. Adult mortality was observed after 24 h with the LC50 
              of 0.029 mg/cm2 for Ae. aegypti and 0.028 mg/cm2 for 
              Ae. albopictus. In adulticidal bioassay, M. cajuputi 
              essential oils showed effective results at 0.04 mg/cm2 concentrations, 
              with values for KT50 of 77.71 min for Ae. aegypti and 
              69.49 min for Ae. albopictus. M. cajuputi essential oils 
              exhibited moderate toxicity effects against the larva and adults 
              of Aedes species and may be used as an alternative to chemical 
              insecticide.   
             
           Keywords: Adulticidal; Aedes; essential oil; larvicidal; Melaleuca cajuputi  
               
             
           ABSTRAK
            
           Tujuan kajian ini adalah 
              untuk menilai aktiviti ekstrak daun minyak pati Melaleuca cajuputi secara in vitro terhadap larva Aedes 
              aegypti dan Aedes albopictus. Minyak pati M. cajuputi 
              diperoleh secara stim penyulingan-hidro dan dianalisis menggunakan 
              GC-MS untuk 
              menentukan komponen bahan kimia. Analisis GC-MS menunjukkan 
              kandungan komponen kimia minyak pati M. cajuputi terdiri 
              daripada 13 sebatian dengan dua unsur kimia utama iaitu asid 2-propenoik 
              (29.55%) dan kariofilena (20.04%). Bioasai nyamuk dewasa dan larva 
              dijalankan mengikut garis panduan WHO. Bioasai larva telah dijalankan dengan minyak pati M. 
              cajuputi berkepekatan 10, 50, 80, 100, dan 120 mg/L terhadap 
              instar 3 Ae. aegypti dan Ae. albopictus yang memberikan 
              nilai LC50 masing-masing, 
              ialah 120.99 mg/L dan 222.58 mg/L. Kadar mortaliti nyamuk dewasa 
              diperhatikan selepas 24 jam dan nilai LC50 yang diperoleh bagi Ae. aegypti 
              dan Ae. albopictus masing-masing, ialah 0.029 mg/cm2 dan 
              0.028 mg/cm2. Melalui ujian bioasai adultisid yang dijalankan, minyak 
              pati M. cajuputi menunjukkan hasil yang efektif pada kepekatan 
              0.04 mg/cm2 dengan nilai KT50 ialah 77.71 min bagi Ae. 
              aegypti dan 69.49 min bagi Ae. albopictus. Minyak pati 
              M. cajuputi menunjukkan kesan ketoksikan sederhana terhadap 
              larva dan dewasa spesies Aedes dan dapat digunakan sebagai 
              insektisid alternatif terhadap insektisid bahan kimia.  
               
             
           Kata kunci: Adultisidal; Aedes spp.;
            bioaktiviti; larvisidal; Melaleuca cajuputi; minyak pati
  
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           *Pengarang
            untuk surat-menyurat; email: azlindaab@usm.my
            
              
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