Antibacterial Effectiveness of Gading Kuning Coconut Extract (Cocos nucifera var. Eburnea) in Aeromonas hydrophila Bacteria In Vitro

Fish disease caused by Aeromonas hydrophila bacteria is very dangerous. These bacteria spread very quickly and result in a decrease in growth rates and can kill fish. To overcome this problem, fish cultivators usually use chemical drugs or antibiotics. However, the use of antibiotics can cause bacterial resistance and the presence of antibiotic residues in fish which can be harmful if the fish is consumed, so it is necessary to do other alternatives using traditional medicine. Yellow ivory coconut husk (Cocos nucifera var. Eburnea) is believed to have antibacterial properties. However, the content of potential secondary metabolites in these plants is not known, therefore this study aimed to determine the ability of the extract of the yellow ivory coconut husk  (Cocos nucifera var. Eburnea) in inhibiting the growth of Aeromonas hydrophila bacteria. This study used a completely randomized design (CRD) with 6 treatments and 4 repetitions. The method used in this study is the disc diffusion method. The results of the disc diffusion method showed that the extract of ivory yellow coconut coir (Cocos nucifera var. Eburnea) was able to inhibit the growth of Aeromonas hydrophila bacteria. The concentration of coco coir extract of yellow ivory (Cocos nucifera var. Eburnea) 5000 ppm had the highest inhibition zone value with an average of 12.225 mm. Statistical test results show the value of Asymp. Sig of 0.004 which means <0.05. This indicates that the extract of the yellow ivory coconut husk (Cocos nucifera var. Eburnea) is able to inhibit the growth of Aeromonas hydrophila bacteria