Her father, James Clarke, died in November 1920 in the country's second fatal air crash.
[5][7] After the war she returned to New Zealand until the late 1950s when she convened the Commonwealth Committee on Preventive Medicine in London.
[8] In 1964 she proposed to the government of Malta that they use human ecology as the framework for development planning.
[5][7][9] Daysh supported many community projects which were examples of human ecology and sustainability: community-based reafforestation in India, urban market gardens for women in Sierra Leone, reconstruction after a tsunami in Sri Lanka, and micro-banks to support women's businesses in Africa to name a few.
In 2009 the University of Waikato awarded Daysh an honorary doctorate in recognition of her work in human ecology.