Table 2.

Results of Plasmodiophora brassicae analyses in soil samples from 59 fields intended for field experiments in winter oilseed rape in southern and central Sweden, July 2014.

DNA copies g−1 soil	0 *	<1300 **	1300–50,000	50,000–325,000	>325,000
Number of samples	33	16	5	2	3
% of all fields	56	27	9	3	5

* P. brassicae DNA not detected (number of copies below the limit of detection); ** P. brassicae DNA detected, but at levels below the limit of quantification.