This study was designed to prevent fungal disease (Saprolegnia parasitica) that occurs on rainbow trout eggs (Oncorhynchus mykiss) by using wastes of onion (Allium cepa) and garlic (Allium sativum) plants. For this purpose, fertilized rainbow trout eggs were exposed to garlic skin, garlic stem and onion skin aqueous methanolic extracts by bathing in concentrations of 0.4, 0.8, 1.6 and 3.2 g/L, whereas the control group was left untreated. The larvae in all groups were monitored until they become free‐swimming larvae, the number of eggs died due to fungus was recorded, and the data obtained from experimental groups and control group were compared. As a result, it was determined that onion skin had no effect on the number of eggs that died due to fungus (p > .05), while garlic skin and garlic stem extracts significantly reduced the number of fungal infestations without affecting the number of live larvae or the embryological development of the eggs (p < .05). In light of these data, we conclude that garlic skin (0.4, 0.8, and 1.6 g/L) and garlic stem (0.8 and 1.6 g/L) aqueous methanolic extracts are effective at preventing Saprolegnia parasitica infestation on rainbow trout eggs and may be used in aquaculture.

中文翻译：

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使用洋葱（大蒜）和大蒜（大蒜）废物预防虹鳟鱼（Oncorhynchus mykiss）卵上的真菌病（Saprolegnia parasitica）。

这项研究旨在通过使用洋葱（Allium cepa）和大蒜（Allium sativum）来预防虹鳟鱼卵（Oncorhynchus mykiss）上发生的真菌病（Saprolegnia parasitica）。）植物。为此，将受精的虹鳟鱼卵以0.4、0.8、1.6和3.2 g / L的浓度浸泡在大蒜皮，大蒜茎和洋葱皮的甲醇水浸液中，而对照组则未经处理。监测所有组中的幼虫，直到它们变成自由游动的幼虫为止，记录因真菌而死亡的卵数，并比较从实验组和对照组获得的数据。结果，确定洋葱皮对因真菌死亡的卵数没有影响（p  > .05），而大蒜皮和大蒜茎提取物显着减少了真菌侵染的数量，而没有影响活体的数量。幼虫或卵的胚胎发育（p <.05）。根据这些数据，我们得出结论，大蒜皮（0.4、0.8和1.6 g / L）和大蒜茎（0.8和1.6 g / L）含水甲醇提取物可有效预防虹鳟鱼卵上的腐烂腐烂症（Saprolegnia parasitica）侵染，并且可能是用于水产养殖。