Di Berry is a great pioneer in the history of modern mycology. He discovered the pathogenic fungi of plant rust and smut, opened the door to the study of plant pathology, and was known as the "father of plant pathology". He made extensive and in-depth research on many fungi, which laid the foundation for mycology and later development. Therefore, he was later called "the founder of modern mycology".

Fungi are eukaryotes with eukaryotic cells, sporulation and no chloroplast. Including mold, yeast, mushrooms and other well-known mushrooms. More than120,000 kinds of fungi have been found. Fungi are independent of animals, plants and other eukaryotes, forming their own world. Fungal cells contain chitin, which can produce spores through asexual reproduction and sexual reproduction.