Adolph Franz Schindler, 60, who retired in February as a research plant pathologist for the Food and Drug Administration, died of a brain tumor Wednesday at his home in Vienna, Va.

During his 31-year government career, Mr. Schindler specialized in research studies of the isolation of mycotoxins, or mold toxins, produced in foods and food ingredients.

After graduating from the University of Maryland in 1949, he joined the Department of Agriculture's Beltsville Research Center, where he did research on the disease trichinosis.

In 1952, on a University of Maryland research fellowship in conjunction with the Agriculture Department, he studied nematode infection of greenhouse-grown roses. Nematodes are toxic materials, such as aflatoxins, produced by molds growing in or on foods. They may be carcinogenic or otherwise toxic. Mr. Schindler was awarded a master's degree in plant pathology from the university for this work.

In 1964, Mr. Schindler transferred to the FDA's division of microbiology, where he continued his research work in the study of mycotoxins and plant stress metabolites until his retirement.

A native of New York City, Mr. Schindler came to the Washington area in 1939 to work for the Government Printing Office.

He was a member of the American Society for Microbiology and the Association of Official Analytical Chemists.

Survivors include his wife, the former Patricia Smalley, and a son, John Stephen, both of Vienna, and a sister, Stephanie Attanasi of Matawan, N.J.

The family suggests that expressions of sympathy be in the form of contributions to the American Cancer Society.