MEMPELAJARI PENGARUH KONSENTRASI EKSTRAK RIMPANG LENGKUAS (Alpinia galanga) TERHADAP PERTUMBUHAN Aspergillus flavus PADA KACANG TANAH

Abstract

This study conducted to determine the optimal concentration of galangal rhizome extract
(Alpinia galanga) for inhibiting the growth of A. flavus in peanuts. The concentration of Alpinia
galanga extract used in this study were 0.1%, 0.2%, 0.3%, and 0.4%. In this study using a descriptive
analysis and displaying the results of the research presented in images and tables. While quantitative
data were also analyzed by the method of completely randomized design (CRD) analyzed by analysis
of variance and continued with different test by Least Significant Difference test (LSD 5%).
The results showed that the crude extract of (Alpinia galanga) had the ability to inhibit the
growth of A. flavus, with very strong categorized on PDA. At a concentration of 0.4% did not find
any growth of A. flavus, whereas the largest population grows at a concentration of Alpinia galanga
ekstract 0.0% (without the exstract Alpinia galanga) that was 121.33 x 103 cfu / g. At a concentration
of 0.4% was also able to inhibit the growth of A. flavus that contaminate peanuts with the inhibition of
up to 100%.