Journal of Pure and Applied MicrobiologyVol. 11 No. 3

Herbal Plant Crude Extracts and Essential Oils to Control Anthracnose Disease in Dendrobium ‘Earsakul’

W. Kaewduangta1*, W. Sutthisa2, M. Nakornriab3 and P. Rermkratog1

1 Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Mahasarakham 44150, Thailand. 2 Department of Biology, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand. 3Department of Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand.

Received on 20 June 2017 and accepted on 15 August 2017



The effect of crude extracted and essential oils was compared for controlling anthracnose disease in Dendrobium ‘Earsakul’. Dendrobium ‘Earsakul’ was tested to determine the efficiency of five Thai medicinal herbs: galangal, garlic, lemongrass, turmeric and ginger on the growth inhibition of Colletotrichum sp. as the pathogens of anthracnose or leaf blight disease. Each medicinal plant was blended and macerated in 95% ethyl alcohol and sterile distilled water at ratio 200 g: 400 mL for seven days. Crude extracts and essential oil were tested for inhibition of their antifungal potentials against Colletotrichum sp. by food poison technique. Results in the laboratory and under greenhouse condition showed that 8,000 ppm essential oil of ginger inhibited the growth of Colletotrichum sp. both before and after disease infection at 100% similar with the chemical compound Mancozeb.

Keywords : Dendrobium ‘Earsakul’, plant extract, essential oil, Thai medicinal herb, Colletotrichum sp.