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Correlation Between Resistance in Maize to Local and Systemic Infection by Peronosclerospora sorghi in Thailand. J. M. Bonman, Postdoctoral Fellow, Rockefeller Foundation, G.P.O. Box 2453, Bangkok, Thailand. B. L. Renfro, Plant Pathologist and CIMMYT Asian Maize Coordinator, Rockefeller Foundation, G.P.O. Box 2453, Bangkok, Thailand, and N. Singburaudom, Instructor, Department of Plant Pathology, Kasetsart University, Bangkok, Thailand. Plant Dis. 67:219-220. Accepted for publication 27 July 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-219.

Local lesions on maize (Zea mays) seedlings caused by Peronosclerospora sorghi were rated, based on the extent of sporulation on the second leaf. The local-lesion ratings were positively correlated with the amount of systemic infection that developed later, which supports the hypothesis that local-lesion resistance to P. sorghi is associated with systemic infection resistance.