Abstract
Generally, it is best to avoid pesticide application when rainfall is likely; however, weather can be unpredictable, so it is best to choose a product with good rainfast characteristics. Learn more in this 3-page fact sheet written by Bonnie Wells and F.M. Fishel, and published by the UF Department of Agronomy, August 2011.
References
Ebeling, W. 1963. "Analysis of the Basic Processes Involved in Deposition, Degradation, Persistence and Effectiveness of Pesticides." Residue Reviews 3:35-163. https://doi.org/10.1007/978-1-4615-8377-6_3
Fishel, F.M. 2010. Pesticide Formulations. PI231. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/pi231.
McDowell, L.L., G.H. Willis, S. Smith, and L.M. Southwick. 1985. "Insecticide Runoff from Cotton Plants as a Function of Time between Application and Rainfall." Trans Amer Soc Agric Eng 28:1896-1900. https://doi.org/10.13031/2013.32538
Thacker, J.R.M., and R.D.F. Young. 1999. "The Effects of Six Adjuvants on the Rainfastness of Chlorpyrifos Formulated as an Emulsifiable Concentrate." Pesticide Science 55:197-218. http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1096-9063(199902)55:2%3C198::AID-PS867%3E3.0.CO;2-R/pdf. https://doi.org/10.1002/(SICI)1096-9063(199902)55:2<198::AID-PS867>3.0.CO;2-R
Wise, J. 2010. "Rainfast Characteristics of Insecticides." Crop Advisory Team Alert. Michigan State University. Accessed August 1, 2011. http://www.ipmnews.msu.edu/fruit/Fruit/tabid/123/articleType/ArticleView/articleId/2599/Rainfast-characteristics-of-insecticides.aspx.