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Infrared Fluorescence of Corn Leaves Infected by Helminthosporium maydis. G. H. Suits, Environmental Research Institute of Michigan, Ann Arbor 48104; G. R. Safir(2), R. R. Legault(3), and A. H. Ellingboe(4). (2)(4)Department of Botany and Plant Pathology, Michigan State University, East Lansing 48823; (3)Environmental Research Institute of Michigan, Ann Arbor 48104. Phytopathology 64:615-619. Accepted for publication 1 November 1973. DOI: 10.1094/Phyto-64-615.

Corn leaves (Texas male-sterile cytoplasm) were inoculated with Helminthosporium maydis (Race T) and infrared (IR) fluorescences of lesions, adjacent areas, and healthy tissues were measured. The IR fluorescences of lesion areas were lower in all cases than were the surrounding tissues. The IR fluorescences of tissues surrounding lesions were similar to those of healthy tissues on noninoculated leaves.

Additional keywords: remote sensing, disease detection, southern corn leaf blight.