Plant pathology: a 55-year retrospective.

Plant pathologist George Zentmyer, Professor Emeritus in the Riverside branch of the University of California, has devoted much of his life to the benefit of avocado growers worldwide. He is widely known in our industry, respected and revered. Dr. Zentmyer has for forty-eight years enlightened members of the California Avocado Society through his annual contributions to the Yearbook. In this article, his admirers have an opportunity to look back, with him, on his long, distinguished—and still active—role in the avocado industry.