CROWN rot of sugar beet and mangel is an unsatisfactory disease to account for, and some doubt has always attended the attribution of it to the fungus Phoma bet“, Frank. It was not entirely surprising, therefore, that Brandenburg1 has recently shown in Holland that the disease is caused by boron deficiency, and can be cured by the addition of this element, in the entire absence of the fungus. This has now been confirmed in Ireland.
Brandenburg E., Phytopath. Z., 3; 499; 1931.
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The Botanical Review (1936)