Abstract
Diquat is applied directly to plants along ditch banks and within aquatic systems. It may also be applied to ponds, lakes, and drainage ditches to control algae and submersed aquatic weeds. This 7-page fact sheet introduces users of diquat to the physical, chemical, environmental, and ecological properties of this herbicidal active ingredient relative to the aquatic environment. Written by P. Chris Wilson and Jun Wu, and published by the UF Department of Soil and Water Science, October 2012.
References
Brian, R.C. 1967. "The Uptake and Adsorption of Diquat and Paraquat by Tomato, Sugar Beet, and Cocksfoot." Ann. Appl. Biol. 59, no. 1:91-9. doi: 10.1111/j.1744-7348.1967.tb04420.x https://doi.org/10.1111/j.1744-7348.1967.tb04420.x
California Environmental Protection Agency (CA EPA). 2000. California Public Health Goal for DIQUAT in Drinking Water. Office of Environmental Health Hazard Assessment, Pesticide and Environmental Toxicology Section, Deputy Director for Scientific Affairs.
CA EPA. 1994. Diquat Dibromide: Risk Characterization Document. Medical Toxicology and Worker Health and Safety Branches, Department of Pesticide Regulation.
Chemblink Database. Accessed March 2012. http://www.chemblink.com.
Dictionary.com. "Ecotoxicology." Merriam-Webster's Medical Dictionary. Merriam-Webster, Inc. Accessed August 2011. http://dictionary.reference.com/browse/ecotoxicology.
Dictionary.com. "Free radical." Dictionary.com Unabridged. Random House, Inc. Accessed August 2011. http://dictionary.reference.com/browse/free radical.
Fernández, M., M. Ibáñez, Y. Picó, and J. Mañes. 1998. "Spatial and Temporal Trends of Paraquat, Diquat, and Difenzoquat Contamination in Water from Marsh Areas of the Valencian Community (Spain)." Arch. Environ. Contam. Toxicol. 35: 377-84. https://doi.org/10.1007/s002449900391
Hazardous Substances Data Bank (HSDB). 2012. "Diquat." National Library of Medicine. Accessed July 2012. http://toxnet.nlm.nih.gov.
Ibáñez, M., Y. Picó, and J. Mañes. 1996. "On-line Liquid Chromatographic Trace Enrichment and High Performance Liquid Chromatographic Determination of Diquat, Paraquat and Difenzoquat in Water." Journal of Chromatography A 728: 325-31. https://doi.org/10.1016/0021-9673(95)00902-7
Ibáñez, M., Y. Picó, and J. Mañes. 1997. "On-line Determination of Bipyridylium Herbicides in Water by HPLC." Chromatographia 45: 402-7. https://doi.org/10.1007/BF02505592
Kamrin, M.A. 1997. Pesticide Profiles: Toxicity, Environmental Impact, and Fate. Boca Raton, FL: CRC Press. https://doi.org/10.1201/9781420049220
Langeland, K.A., and J.P. Warner. 1986. "Persistence of Diquat, Endothall, and Fluridone in Ponds." J. Aquat. Plant Manage. 24:43-6.
U.S. Environmental Protection Agency (U.S. EPA). 1995. Reregistration Eligibility Decision (RED) Diquat Dibromide. EPA 738-R-95-016. Washington, D.C: U.S. EPA.
Vencill, W.K. 2002. Herbicide Handbook, 8th ed. Lawrence, KS: Weed Science Society of America.
Ware, G.W. 1978. "Herbicides." In The Pesticide Book, 85. San Francisco, CA: W.H. Freeman and Co.
Wauchope, R.D., T.M. Buttler, A.G. Hornsby, P.W.M. Augustijn-Beckers, and J.P. Burt. 1992. "The SCS/ARS/CES Pesticide Properties Database for Environmental Decision-making." Rev. Environ. Contam. Toxicol. 123:1-164. https://doi.org/10.1007/978-1-4612-2862-2_1
World Health Organization (WHO). 2004. Diquat in Drinking-Water: Background Notes for Development of WHO Guidelines for Drinking-Water Quality. WHO/SDE/WSH/03.04/91. Accessed July 2012. http://www.who.int/water_sanitation_health/dwq/chemicals/diquat.pdf.
Wilson, C. 2006. Aquatic Toxicology Notes: Predicting the Fate and Effects of Aquatic and Ditchbank Herbicides. SL236. Gainesville, FL: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/ss455. https://doi.org/10.32473/edis-ss455-2006