Seasonal Availability ofPhaeocryptopus gaeumanniiAscospores and Conditions That Influence Their Release
- 1 January 1984
- journal article
- research article
- Published by Scientific Societies in Plant Disease
- Vol. 68 (11) , 942-944
- https://doi.org/10.1094/pd-69-942
Abstract
Ascospores of P. gaeumannii were released from pseudothecia on moistened needles from April through Sept. with maximum numbers released during June and July. Pseudothecia on 1-yr-old needles released 10 times more ascospores than did those on 2-yr-old needles. Moistened pseudothecia released 75% of available ascospores within 20 min and all within 4 h. Ascospores were released at 5.degree.-30.degree. C, with maximum release at 20.degree. C. Compared with darkness, UV or fluorescent light sources enhanced ascospore release.Keywords
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