He worked on the management of rusts and smuts of field and fruit crops.

He studied botany at the University of Berlin under Adolf Engler, writing his thesis on the fungi of Egypt.

He worked in Italy briefly in 1921 and then moved back to Palestine to start a department of plant pathology.

In 1942 he moved to the Hebrew University's School of Agriculture at Rehovot.

He served as a professor from 1949 to 1959, co-founding the Palestine Journal of Botany in 1938.