Surfactant (Genapol OX-80) toxicity to Selenastrum capricornutum

• Author(s): Anastácio, P. M. ; Holten Lützhøft, H. -C. ; Halling-Sørensen, B. ; Marques, J. C.
• Date: 2000
• Persistent ID: http://hdl.handle.net/10316/5450
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Crayfish
• Document Type: Article
• Language: English

Description

A non-ionic surfactant (Genapol OX-80) was proposed as a means of reducing destructive crayfish activity in rice. In order to study the toxicity of this product on algae, a test in accordance to the ISO 8692 protocol (1989) was performed. The growth inhibiting effect of the pure formulation of Genapol OX-80 was studied on Selenastrum capricornutum in the concentration range of 0.01-1.0 mg/l. The result indicated a 72 h EC50-value of 0.5 mg/l. The suggested field concentration of approximately 50 mg/l is therefore two orders of magnitude above the algal EC50-value. From our findings it is expected that the impact on the rice field algae will not be negligible. http://www.sciencedirect.com/science/article/B6V74-3YGDD0T-1Y/1/bda06103b75e0d299aa2d54fae0c04da