ฤทธในการยับยั้งเชื้อราของนํ้ามันหอมระเหยอบเชยต่อเชื้อรา Penicillium citrinum แล Aspergillus flavus ที่แยกได้จากยางแผ่นในพื้นที่จังหวัดอุบลราชธานี

The aim of this research was to identify the fungal species contaminated on rubber sheets in Ubon Ratchathani including Mueang, Khueang Nai, Trakan Phuet Phon and Nam Yuen Districts. The efficiency of cinnamon essential oil used for inhibiting the growth of fungi isolated from the rubber sheets was also investigated and compared with captan. The results showed that 5 species were the most fungi found on the rubber sheets. Aspergillus flavus was the most, followed by Penicillium citrinum and A. tamari, respectively. Paper disc diffusion was used to determine the effect of cinnamon oil to inhibit the growth of P. citrinum and A. flavus. The results showed that cinnamon oil could inhibit the growth of P. citrinum and A. flavus at the minimum concentration of 25,000 ppm with the inhibition zone of 14.47 and 9.62 mm, respectively. Moreover, it was found that cinnamon oil was an effective compound in inhibiting the growth of two fungal species better than captan. The difference was statistically significant at the 95% confidence level. [ABSTRACT FROM AUTHOR]