Despite this, our unpublished field and glasshouse research conducted under conditions of low disease expression showed a trend towards reduced clubroot severity and gall sizes in broccoli treated with the seaweed extract.
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The suppressive effect of a commercial extract from <i>Durvillaea potatorum</i> and <i>Ascophyllum nodosum</i> on infection of broccoli by <i>Plasmodiophora brassicae</i>.
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