Speed scouting is a different way to determine if soybean aphids have reached the 250 aphids per plant threshold. It relies on the number of "infested" plants. Plants are considered "infested" if there are 40 or more aphids on that sample more plants or if treatement is recommended.
The information in this application is adapated from: Hodgson, E.W., E.C. Burkness, W.D. Hutchison, and D.W. Ragsdale. 2004. Enumerative and Binomial Sequential Sampling Plans for Soybean Aphid (Homoptera:Aphididae) in Soybean. Journal of Economic Entomology 97(6): 2127-2136. http://www.bioone.org/doi/pdf/10.1603/0022-0493-97.6.2127
Email Wayne Ohnesorg,UNL Entomologist, about the app.
Screen shots of the Aphid Speed Scout app.