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 language | English (US) |
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Pages (from-to) | 1032-1038 |
Number of pages | 7 |
Journal | Canadian Journal of Botany |
Volume | 70 |
Issue number | 5 |
DOIs | |
State | Published - 1992 |
Externally published | Yes |
ASJC Scopus subject areas
- Plant Science