Abstract
Myrtle rust (Austropuccinia psidii) is an important disease on guava (Psidium guajava) and other species of the Myrtaceae family. There are several studies carried out with this pathogen in eucalyptus, but very little information is available about this disease in other hosts of the Myrtaceae family. Intraspecific diversity has already been observed in A. psidii, but most studies provide …