Marie Beatrice "Bea" Schol-Schwarz was the Dutch phytopathologist who discovered the causal fungus of Dutch elm disease. She first studied pathogens afflicting peanuts and later the fungus Phialophora.
Bea Schwarz (left) and her doctoral advisor Johanna Westerdijk in 1922
Ulmus × hollandica 'Bea Schwarz' in Amsterdam, Netherlands in 2004
Johanna Westerdijk was a Dutch plant pathologist and the first female professor in the Netherlands.
Prof.dr. Johanna Westerdijk
Group portrait with Johanna Westerdijk in the center after her oration as a new professor in 1917