20.6 References

Take Action Herbicide Resistance Management – Herbicide Classification Chart

https://www.iwilltakeaction.com/uploads/files/57229-6-final-ta-hrm-classificationposter-lr.pdf

Bugwood Image Database  https://images.bugwood.org/

Loux, M.M., A.F. Dobbels, W.G. Johnson, G.R.W. Nice, T.N. Jordan, and T.T. Bauman. 2018. Weed Control Guide for Ohio, Indiana and Illinois. The Ohio State University Extension and Purdue Extension. Bulletin 789. https://cpb-us-w2.wpmucdn.com/u.osu.edu/dist/7/3461/files/2017/11/2018-weed-guide-with-covers-1mqbvsq.pdf

Iowa State University Agronomy course reference. http://agron-www.agron.iastate.edu/~weeds/Ag317/manage/herbicide/dnas.html