Dr. Orillo's researches in plant pathology helped pave the way to minimizing losses suffered by crop producers attributable to plant diseases. Noteworthy of his scientific publications are on coffee rust, blight affecting kenaf and leaf spot of maize caused by Helminthosporium maydis.
Birthdate: 16 February 1921
Died: 13 December 2006
- Ph.D. Mycology - Harvard University 1950
- M.A Mycology - Harvard University 1948
- B.S.A Plant Pathology - University of the Philippines 1944