Progression of damping-off epidemics in Glycine populations of even- age and mixed-age structure

D. A. Neher, H. T. Wilkinson, C. K. Augspurger

Research output: Contribution to journalArticlepeer-review

Abstract

Development of damping-off epidemics, caused by a random distribution of Pythium aphanidermatum in soybean populations, was quantified in even-aged and mixed-aged populations of Glycine max and Glycine soja. Damping-off epidemics developed more rapidly in populations of G. max than G. soja, in mixed-aged than even-aged populations of G. max, and even-aged than mixed-age populations of G. soja. Diseases soybeans were distributed less uniformly, both temporally and spatially, and epidemics were longer in mixed-aged than even-aged structures and in populations of G. soja. Incidence of preemergence disease was greater near the inoculum source. Seedlings that damped-off after emergence and (or) those that remained symptomless were peripheral to the inoculum source. Epidemic development was dependent upon plant species and the temporal and spatial distribution of susceptible plants and virulent pathogen. -from Authors

Original languageEnglish (US)
Pages (from-to)1032-1038
Number of pages7
JournalCanadian Journal of Botany
Volume70
Issue number5
DOIs
StatePublished - 1992

ASJC Scopus subject areas

  • Plant Science

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