Johanna Westerdijk (1883–1961) was the first female professor in the Netherlands and a pioneering plant pathologist whose work on fungi and plant diseases, especially Dutch elm disease, reshaped agricultural science and opened doors for women in academia.
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Early Life and Education
• Born: January 4, 1883, in Nieuwer-Amstel, Netherlands.
• Family: Came from a wealthy, intellectual household; her father was a physician.
• Nickname: Friends called her “Hans.”
• Education: Initially aspired to be a pianist, but neuritis in her arm ended that path. She turned to botany, studying under Hugo de Vries at the University of Amsterdam.
• PhD: Earned in 1906 from the University of Zurich with a thesis on moss regeneration. Wikipedia
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Career Milestones
• Director of Willie Commelin Scholten Laboratory (1906): At just 23, she led this phytopathology lab, later moving it to Villa Java in Baarn. It became internationally respected. Wikipedia
• Centraalbureau voor Schimmelcultures (CBS): She expanded its fungal collection, now the Westerdijk Fungal Biodiversity Institute, a global hub for fungal taxonomy. Universiteit...
• First Female Professor (1917): Appointed at Utrecht University, later also at the University of Amsterdam. Her inaugural lecture was titled “New Directions in Phytopathological Research.” Springer
• Dutch Elm Disease Discovery: Her team proved that the fungus Ceratocystis ulmi caused elm tree mortality, leading to the term “Dutch elm disease.” Universiteit...
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Contributions to Science
• Plant Pathology: Advanced understanding of fungal diseases in crops and trees.
• Taxonomy: Developed classification systems for fungi still in use today.
• Applied Research: Linked science to social challenges like potato blight and elm disease.
• Global Networks: Maintained international collaborations, making her lab a hub for visiting scholars. Universiteit...
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Advocate for Women in Science
• Mentorship: Supervised 56 PhD students, nearly half of them women.
• Hiring Practices: Preferred female researchers when vacancies arose.
• Legacy: Helped normalize women’s presence in scientific research and academia. Universiteit...
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Personality and Motto
• Charismatic Leader: Known for hospitality, music, and lively gatherings at Villa Java.
• Motto: “Working and partying form healthy minds.”
• Public Engagement: Wrote newspaper articles and organized open-information days to share science with the public. Universiteit...
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Legacy and Modern Relevance
• Scientific Impact: Her fungal collections remain vital for biodiversity and agricultural research.
• Social Impact: She broke barriers for women in Dutch academia.
• Relevance Today: With 25% of harvests still lost to plant diseases, her emphasis on fungal research remains crucial for food security. Universiteit...
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Quick Timeline
Year Event
1883 Born in Nieuwer-Amstel
1906 PhD in Zurich; became lab director
1917 First female professor in the Netherlands
1930 Appointed professor at University of Amsterdam
1961 Died in Baarn
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