Special care
for what one does

"An image reveals a creation, exposes thoughts and feelings, induces creativity and decision".

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Diagnosis of
Plant Diseases

The diagnosis of plant diseases is essential for defining control strategies in an integrated management program.

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Diagnosis of
Seed Pathology

Seedborne pathogens are spread over long distances. Infected seeds are responsible for introducing pathogens into growing areas.

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Get to know our project.

This website features many photos that were shared in the classroom, during lectures, and published in books. However, some photos had not been disclosed before. 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 plant disease photography were sparked by Professor Erlei. In 1989, he introduced me to his camera, a Canon FTb, FD 55mm lens, three close-up rings 58mm +1, +2, and +4, 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.

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Ricardo Trezzi Casa
Project's creator

Plant Diseases

The diagnosis of plant diseases is a fundamental step in the development of an integrated disease management program. Identifying diseases based on symptoms and/or signs is only possible when there are morphological changes in plant organs that differ from their normal or standard appearance. However, such alterations can also be caused by abiotic factors. Understanding the symptomatic picture, especially concerning the primary and secondary symptoms of a disease, must also be taken into account in the diagnostic process. Confirming a biotic disease is facilitated when there are pathogen structures associated with the tissues of infected organs. On this website, photos with primary and secondary symptoms of diseases, as well as some pathogen structures, will be made available.

Plant Diseases

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Work and dedication with just one purpose

Seed Pathology

The detection of an infected seed can be done when the seed shows alterations from its normal (standard) appearance, often implying changes in color, thus assuming that the seed is "sick." To confirm the association of a pathogen in seeds, whether infested or infected, they are routinely subjected to health tests. However, equipment and laboratory methods are not always sufficient to detect and identify pathogens.

The experience and training of the person responsible for the health test are key to obtaining precision and accuracy in seed pathology analysis. As a means of assistance, this website provides photos of symptomatic seeds, seeds infected with colonies of fungi, and some structures of pathogenic fungi infecting seeds.