Epidemiology of Hypovirulence
Unless hypovirulence will spread naturally among virulent infections of Endothia parasitica on American chestnut it will have little or no significance as a biological control. The major constraints to natural spread include: 1) presence of vectors, 2) density of virulent infections, 3) vegetative compatibility, and 4) degree of hypovirulence.
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Author(s): P. R. Day
Publication: American Chestnut Proceedings - 1978