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LCOR2—Spatial Correlation Analysis Software for the Personal Computer. T. R. Gottwald, Research Plant Pathologist, U.S. Department of Agriculture, Agricultural Research Service, 2120 Camden Rd., Orlando, FL 32803. S. M. Richie, and C. L. Campbell. Assistant Professor, Department of Electrical Engineering, University of Central Florida, Orlando 32816; and Associate Professor, Department of Plant Pathology, North Carolina State University, Raleigh 27695. Plant Dis. 76:213-215. Accepted for publication 5 November 1991. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/PD-76-0213.

A software program for the personal computer, written in the ‘C’ language, was developed to analyze spatial patterns of plant disease and pathogen propagules. The program was adapted from a previous mainframe version and is based on the Modjeska and Rawlings model for spatial correlation analysis of uniformity data. The mainframe program was improved by addition of degrees of freedom and significance tables to test correlation coefficients at each spatial lag position. The LCOR2 program will accommodate data files of up to 10,000 points. The LCOR2 program and user guide are available free of charge.