The control of the white-pine blister rust has involved the complete removal of the cultivated European black currants and the eradication of all other species of currants and gooseberries within 900 feet of pine, except as the latter distance has been reduced or extended to meet unusual local conditions. The cultivated red currants have been eradicated along with other species, as a matter of safety, because there has been no information available as to how dangerous these plants are in proximity to pine, or at what distances from them they constitute a menace, if any at all. The following paper shows that the literature generally agrees upon the low degree of susceptibility of red currants to the blister rust fungus and that it contains surprisingly few references to infection of white pine originating from these garden plants. The main body of the paper presents observations and studies showing that in general white pines even at very short distances from red currants are not infected with the blister rust, unless wild Ribes are at least as near to the pines as the currants.
Document Type: Journal Article
New York Department of Conservation
Publication date: October 1, 1941
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