Antifungal activities of essential oils of cinnamon ( Cinnamomum zeylanicum) and lemongrass ( Cymbopogon citratus) on crown rot pathogens of banana

摘要

In the present study, yields of essential oils (EO) from Cinnamomum zeylanicum syn. C. verum and Cymbopogon citratus extracted by hydro-distillation were 0.38% and 0.27% respectively. Their chemical composition obtained by gas chromatography revealed that, cinnamon EO is mainly composed of thujanol (38.22%) and cinnamyl acetate (24.67%) while Lemongrass EO is characterized by linalool acetate (41.29%) and geraniol (32.15%). These oils significantly inhibited mycelial growth and conidia germination. Cinnamon oil was fungicidal at 2075 and 2000?μl/l while Lemongrass oil was fungicidal at 475, 350 and 600?μl/l, respectively, against Colletotrichum musae , Fusarium incarnatum and F. verticillioides . At 1025, 950 and 1088?μl/l C. zylanicum oil totally inhibited conidia germination of C. musae, F. incarnatum and F. verticillioides . For C. citrinus oil , total inhibited occurs at 200, 185 and 275?μl/l respectively, against C. musae, F. incarnatum and F. verticillioides.