Identifying highly connected sites for risk-based surveillance and control of cucurbit downy mildew in the eastern United States 1Biomathematics Graduate Program and Department of Mathematics, North Carolina State University, Raleigh, NC, United States 2Department of Statistics, Oregon State University, Corvallis, OR, United States 3Department of Mathematics, City University of New York, City College, New York, NY, United States 4Agricultural Research Service, U.S. Department of Agriculture,...