Synonyms: Aecidium hepaticatum, Caeoma hepaticatum, Dicaeoma pruni, Puccinia pruni, Puccinia prunorum, Tranzschelia pruni, Tranzschelia punctata, Trichobasis pruni, Trichobasis rhamni.
Tranzschelia pruni-spinosae is a fungal species that causes a disease known as plum rust, primarily infecting plants in the genus Prunus, including plums, peaches, and apricots. In East and Central Texas, this fungus has been found to infect native and cultivated Prunus species, with reports of its presence in counties along the Brazos River and in the Blackland Prairies region. The fungus produces yellow or orange spores on the underside of leaves and can cause significant defoliation and reduction in fruit production.
Plum rust fungus Tranzschelia pruni-spinosae(?) on leaves of plum in Watson Rare Native Plant Preserve. Warren, Texas, June 25, 2022
664, Red Oak Lane, Tyler County, Texas, 77664, United States
Underside of leaves of plum with rust fungus Tranzschelia pruni-spinosae(?) in Watson Rare Native Plant Preserve. Warren, Texas, June 25, 2022662, Red Oak Lane, Tyler County, Texas, 77664, United StatesObservations of the fungus Tranzschelia pruni-spinosae in East and Central Texas reveal its presence on plum leaves. On June 25, 2022, in Warren, Texas, the fungus was found on leaves of plum in the Watson Rare Native Plant Preserve. The upper side of the leaves displayed symptoms of the fungus, while the underside showed a more pronounced infection. The rust fungus formed spores on the underside of the leaves, indicating an active infection. The observations suggest that Tranzschelia pruni-spinosae is present in the region and can infect plum trees, potentially causing damage to the plants. Further study is needed to determine the extent of its distribution and impact on native plant species in East and Central Texas. The fungus's presence highlights the importance of monitoring plant health in preserves like Watson Rare Native Plant Preserve.
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