A thesis of Hamza Habil Otondo

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Date
1984
Authors
Hamza Habil Otondo
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Hamza Habil Otondo
Abstract
Experiments are described in which preconditioned and unconditioned axenic sclerotia of Sclerotinia sclerotiorum (Lib.) de Bary are used to simulate germination of natural popUlations of sclerotia. Counts of carpogenical ly germinated sclerotia were taken from the sclerotia that were incubated at different temperatures. Different concentrations of polyethylene glycol (PEG 20,000 MW) as a medium were used to simulate various water potentials. Varrbus combinations of temperature and water potentials were used to study the effect of interactions of temperature and water potential on carpogenic germination. Similarly, counts of apothecia from sclerotia that had been exposed to various lengths of cold treatment and buried in the field were taken on a weekly basis. Dai ly temperature, rainfall and biweekly readings of soil moisture were monitored during the experiment.
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