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Increased Leaf Exudation Enhances Curvularia Leaf Spot Severity in Virus-Infected Gladiolus. M. K. Beute, Assistant Professor of Plant Pathology, North Carolina State University, Raleigh 27607; Phytopathology 63:1204-1205. DOI: 10.1094/Phyto-63-1204.

Increased susceptibility of virus-infected Gladiolus hortulansus to Curvularia leaf spot disease was correlated with an increased foliar exudation of electrolytic substances and carbohydrates. Extractable epicuticular lipids and wax were less on virus-mottled than on symptomless leaves. Although leachates from both healthy and virus-infected leaves enhanced inoculum potential, greater stimulation resulted with virus-infected leaf washings.

Additional keywords: predisposition, disease complex, cucumber mosaic virus, tobacco ringspot virus.