Greetings. de Jong et al (2002) wrote a physical-mathematical paper
entitled: A model of the escape of Sclerotinia sclerotiorum ascopores from
pasture. Ecological Modelling 150, 83-105. "it also includes ideas from
models for barley, and rice." It is free available: If you send a request
for a PDF-file to meindert.dejong at wur.nl I would be happy to forward this
PDF file in an attachment. Besides I would like to deliver in person the
software (Sporesim) to your university/institute. Regards, Meindert