This website showcases many photos that have been shared in classrooms, lectures, and published in books. However, some of these photos had not been disclosed until now. My dissatisfaction with the lack of disclosure, combined with the support of my friends, motivated me to make them available here.

My initiative and curiosity for photographing plant diseases were sparked by Professor Erlei. In 1989, he introduced me to his camera, a Canon FTb, with an FD 55mm lens, three close-up rings 58mm +1, +2, and +4, along with a piece of black velvet, all of this packed in a somewhat worn light brown leather bag. He taught me how to handle it, entrusting me with many of our photos, most of which were developed into slides.

The beginning of my work was with a Canon EOS Elan IIe Ø 58mm, 28-80mm, 1:3.5-5.6, and with it, many other photos of plant diseases were captured, mostly during the "Plant Disease Diagnosis" course taught by Professor Laércio. Many slides were developed with great effort to cover the costs. I acquired my first digital camera, a Panasonic DMC-FS3 with a Leica lens, which has accompanied me to this day in the field and the laboratory. I believe that providing these photos will assist those who need to identify diseases and pathogens.

Ricardo Trezzi Casa was born in 1969 in the municipality of Passo Fundo, Rio Grande do Sul, Brazil. In 1992, he obtained a degree in Agronomic Engineering from the University of Passo Fundo. Later, in 1995, he enrolled in the Master's program in Plant Pathology at the Federal University of Viçosa, Minas Gerais, where he earned a Master of Science (M.Sc.) degree in Plant Pathology. In 1997, he began his Ph.D. program in Plant Pathology at the same university, receiving his Doctorate (Ph.D.) degree in the year 2000. Since February 2003, he has been a member of the faculty at the Center of Agroveterinary Sciences of the State University of Santa Catarina, CAV-UDESC. He holds the position of full professor, teaching General Plant Pathology and Agricultural Plant Pathology in the Agronomy undergraduate program, as well as Integrated Disease Management and Seed Pathology in the Graduate Program in Plant Production. His research focuses on seed pathology, damage quantification, disease management through cultural practices, and chemical control, with an emphasis on economic damage thresholds.