Hasan Bolkan is a retired research microbiologist who focused his career on plant pathology - diseases and infectious insects in tomato varieties and other produce.

His dissertation (1972) conducted at the University of California, Davis was entitled Studies on Heterokaryosis and Virulence of Rhizoctonia Solani.

[1] Bolkan has written about the importance of seed-testing for pathogens in commercial farming to reduce losses of crop and resources,[2] authored a patent titled, Biocontrol agent for green mold disease of mushrooms,[3] and has served as an associate editor for the Journal of Plant Disease (1996-1997).

[4] Bolkan has acted as a collaborating author on a publication of the Food and Agriculture Organization of the United Nations on sustainability and green farm production.

[7] In his role as director of research for Campbell's agricultural research center, Bolkan has presented his work on integrated pest management and the need to address public and worker safety concerns,[8] and has given talks on identifying and dealing with bacterial canker on tomato plants.