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Mycol Res. 2003 Feb;107(Pt 2):213-22.

Ascospore release and survival in Sclerotinia sclerotiorum.

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  • 1Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK. john.clarkson.@hri.ac.uk


The release and survival of ascospores of a UK Sclerotinia sclerotiorum isolate were studied. Apothecia placed in a spore clock apparatus with different lighting regimes at 15 degrees C released ascospores continuously with an increasing rate for the duration of experiments (72-84 h). Spore release was not confined to light or dark periods in alternating regimes and occurred in continuous dark or light. Ascospores were released in both saturated air (90-95% rh) and at 65-75% rh. High temperature and rh were detrimental to ascospore survival but spore viability was maintained for longer periods than previously reported. The significance of these results in relation to disease control is discussed.

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