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Incidence and spatial patterns of eight foliar pathogens and diseases were monitored during two 6-wk growth periods per year from June to September in 1990 and 1991 on regularly spaced plants of white clover (Trifolium repens) planted in a tall fescue (Festuca arundinacea) sward in a 10-ha pasture in Wake County, North Carolina. Disease ratings were made in four plots on a total of 512 plants in eight square lattices of 64 plants each. Each plot comprised two proximal lattices of either the virus-susceptible white clover cultivar, Regal, or the Southern Regional Virus Resistant white clover germ plasm []
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Scot Nelson (1993) studied this question.
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