Jenny Aurielle B. Babon, Sheila Mae T. Nolido, Filame Joy D. Uyaco (March 1998)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
Formalin and hydrogen peroxide were tested for their efficacy to prevent the spread of fungal infections (Saprolegniasis) on Oreochromis mossambicus eggs. 50 eggs were assigned to each of the 14 treatment trays. The trays were then divided into two groups: the positive, which was infected with Saprolegnia, and the negative, which was uninfected. Positive and negative controls were not given chemical treatments.
One way Analysis of Variance proved that formalin and hydrogen peroxide has significant effect (p<0.05) on preventing Saprolegniasis on the fish eggs.
0.5 mL/L of water concentration of hydrogen peroxide had the highest efficacy on both positive and negative groups; 1.0 and 1.5 mL/L of water concentrations of formalin were not tolerated by Oreochromis mossambicus eggs resulting to 100% mortality on the final treatment.