Fish disease is one of the obstacles in aquaculture business due to disease outbreaks that can cause fish death. This disease is the result of an imbalance between the host, pathogen, and the environment. One of the most common pathogens in Cyprinidae family is parasites. Parasites are organisms that live on or in other organisms (hosts), which get some or all of the organisms’ nutrients and cause high levels of organism damage. A. japonicus parasites are found throughout the world and infect freshwater aquaculture.
The A. japonicus tend to be found on the caudal fin, body surface, pectoral fin, lower abdominal fin, dorsal fin, operculum and head. A. japanicus becomes a parasite by sucking host blood, causing damage to the host skin through the Maxillule and preoral stylet. Injuries caused by A. japonicus on the body of the fish cause secondary infections. Secondary infections in fish injuring the skin and body surface can cause high mortality. A. japonicus is an ectoparasite that is easily reproduced by a direct life cycle that requires a host to develop from larvae to adults. A. japonicus reproduces by laying around 20-250 eggs. Population control of A. japonicus must be carried out to prevent fish from becoming infected.
M. oleifera leaves are natural ingredients that contain phytochemical compounds. Phytochemical compounds functioning as insecticides include saponins, tannins, flavonoids, alkaloids, terpenoids, steroids, sterols, phenols, polyphenols, and essential oils. The content of active ingredients in plants such as flavonoids, saponins, alkaloids, and tannins are pharmacologically toxic. Therefore, further research needs to be done about the active ingredient of M. oleifera leaves against damage to A. japonicus eggs. The purpose of this study was to analyze the effect of immersion of M. oleifera leaves with different concentrations on damage to A. japonicus eggs and determine the optimal concentration of M. oleifera leaves that can damage A. japonicus eggs up to 100%. This research is expected to prevent the parasitic infection.
This study used four water extract treatments, 0% (A), 4% (B), 6% (C), and 8% (D) with five repetitions. The results showed that each treatment had a significant effect on damage to A. japonicus eggs (P
Author: Dr Kismiyati
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