Diseases
Rosa L.
A fungal disease of roses caused by specialized parasites of the genus Phragmidium. It manifests as bright orange pustules on the aerial parts of the plants, leading to shoot deformation and premature leaf drop.
In the reference 114 varieties crop Rose, where this is mentioned in the description.
The causative agents of the disease are obligate autoecious parasites Phragmidium mucronatum, Phragmidium tuberculatum, and other species of this genus, which infect leaves, stems, and buds. In spring, swellings and cracks with orange spore cushions form on young shoots and buds, while chlorotic spots appear on the upper side of the leaves.
During the growing season, bright orange uredinia form on the underside of the leaves, which are replaced by dark teliospores intended for the pathogen's overwintering toward the end of the season. Severe infection causes deformation of plant organs and disruption of water balance, which leads to significant exhaustion of the bush.
General information about the subject — on the page Rust.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Wilhelm Kordes / Tim-Hermann Kordes / Margarita Kordes in Fa. W. Kordes' Söhne Rosenschulen GmbH & Co KG
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Rumen Conev, Canada/Parminderjit Sandhu, Canada
Rosa L. · Rose
William J. Radler
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Meilland Alain A.
Rosa L. · Rose
Wilhelm Kordes^^^Tim-Hermann Kordes^^^John Vincent Kordes
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
Takeuchi Shunsuke|Chiba-Ken, JP
Rosa L. · Rose
KIMIHARU HAYANO
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
DAVID JC AUSTIN
Rosa L. · Rose
Wilhelm-Alexander Kordes, Tim-Hermann Kordes, John-Vincent Kordes
Rosa L. · Rose
W. Kordes Sohne Rosenschulen GmbH & Co KG| DE
Rosa L. · Rose
R.G.JELLY
Rosa L. · Rose
Starkl, Ludwig|Vienna, Austria
Rosa L. · Rose
Meilland, Alain A.|Antibes, France
Rosa L. · Rose
Zary Keith W.|Thousand Oaks, CA
Rosa L. · Rose
WARNERS ROSES
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Meilland Alain M.
Rosa L. · Rose
Meilland Alain A.|Antibes, FR