M. M. Dewdney, C. Walker, P. D. Roberts, N. A. Peres, T. S. Schubert, and M. R. Estes, “2020–2021 Florida Citrus Production Guide: Citrus Black Spot: Chapter 36, PP279/CG088, rev. 3/2020”, EDIS, vol. 2020, no. CPG, Aug. 2020.