摘要：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, Phaeodacty-lum tricornutum cultured in laboratory was investigated. Diflubenzuron was applied to phytoplankton with the two concentration of 0.02 and 0.25mgl-1 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.
