Activity of Cymbopogon citrarus Ethanol Extract against Chrysomya megacephala and its Application in Salted Fish Processing

The drying process of salted fish traditionally involves exposure to sunlight, which poses a risk of contamination from fly and larvae, especially Chrysomya megacephala. This causes microorganism contamination which can accelerate quality deterioration and increase the risk of food safety hazards. Therefore, this research aims to prevent fly contamination by using natural insecticides derived from lemongrass extract. The experimental process was carried out using randomized block design (RBD) with 3 treatments and 3 replications. The data were then analyzed using analysis of variance (ANOVA), and sensory data was analyzed using Kruskal-Wallis analysis. The results showed that 10% lemongrass (Cymbopogon citrarus) ethanol extract was able to weaken fly larvae and oust them from the container, while a 20% concentration led to the death of the larvae. Spraying lemongrass extract significantly impacted fly larvae, proving particularly effective at a 20% concentration. Specifically, the application of 10% lemongrass extract led to a 42% reduction in landed flies, while a 20% concentration resulted in an 81% reduction. The results underscore the superior efficacy of 20% lemongrass extract in preventing fly contamination. However, sensory analysis such as smell, taste, and color showed significantly different values. With regards to temperature and humidity, most flies perch at air temperatures ranging from 26–32oC and humidity ranging from 50–80%. This research showed that the concentration of 20% lemongrass extract in the treatment process was the most effective in preventing fly contamination during the drying of salted fish.