Effects of Wounding and Wetting Duration on Infection of Asparagus by Stemphylium vesicarium. Dennis A. Johnson, Extension and Associate Plant Pathologist, Washington State University, Irrigated Agriculture Research and Extension Center, Prosser 99350. J. D. Lunden, Research Technician II, Washington State University, Irrigated Agriculture Research and Extension Center, Prosser 99350. Plant Dis. 70:419-420. Accepted for publication 18 November 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-419.

Wounding was not required for infection on asparagus by Stemphylium vesicarium. However, infections were more numerous and occurred at shorter wetting durations on wounded than on nonwounded plants. Wounds produced by blowing sand were entry points for infection when infection occurred 24–48 hr after injury.