The effect of diflubenzuron to the culture of Scenedesmus quadricauda, Phaeodactylum tricornutum (Phytoplankton) and Daphnia magna (Zooplankton)

In this study, the effect of diflubenzuron, reaching to the aquatic environment, used widely to protect chitin synthesis, on the growth of the phytoplankton Scenedesmus quadricauda, Phaeodactylum tricornutum and zooplankton Daphnia magna, cultured in laboratory was investigated. Diflubenzuron was applied to phytoplankton and zooplankton with the two concentration of 0.02 and 0.25mg/l determined by WHO as minimum and maximum doses. At the end of the study it was observed that planktonic organisms were affected negatively from diflubenzuron. It was found that the growth of these phytoplankton decreased and 0.25mg/l diflubenzuron caused to the death of D. magna.