The potential for grey mould control on Douglas-fir seedlings was investigated using under-bench ventilation and aerated styroblocks. Twenty-five percent of all ventilated styroblock seedlings were infected with Botrytis cinerea while 75% of the control seedlings showed signs of infection. The reduced incidence of grey mould in the ventilated treatments was attributed to a more rapid drying of the seedling canopy following watering. The lowest frequency of ideal conditions for B. cinerea infection by spore germination was observed in the seedling canopy of the treatment receiving unheated, forced air ventilation.
FRDA Research Report 077 (620 KB)
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Updated July 24, 2015