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Infection of guava twig and principal vein of leaf, spreading through the blade in the form of irregular lesions.
Marli F. S. Papa
São Paulo State University - UNESP
Email: marlifsp@bio.feis.unesp.br
Host: Guava (Psidium guajava)
Disease name: Bacterial disease of guava
Pathogen name: Erwinia psidii
The species Erwinia psidii was described in Brazil, in 1987, causing a bacteriosis on guava. The bacterium affects mainly branches and twigs of guava trees, producing a collapse of vascular tissues and dieback. Leaves, blossoms and green fruits are also affected. Recommended control methods include pathogen-free propagating material and cultural practices such as pruning infected branches and providing protection against wind and trickle irrigation.
APS publication number: IW000069
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