Roses (Rosa species) are susceptible to a number of pests, diseases and disorders. Many of the problems affecting roses are seasonal and climatic. [1] Some varieties of roses are naturally more resistant or immune than others to certain pests and diseases. Cultivation requirements of individual rose species and cultivars, when observed, often assist in the prevention of pests, diseases and disorders. [2]
Insects that affect roses are often considered pests.
Disease | Bacteria |
---|---|
Bacterial leaf spot or blast | Pseudomonas syringae pv. mors-prunorum |
Crown gall | Agrobacterium tumefaciens |
Hairy root | Agrobacterium rhizogenes |
Plant-parasitic nematodes include several genera and can be detrimental to plants – from attacking plants, acting as vectors spreading plant viruses to endoparasites.
Disease | Nematodes |
---|---|
Dagger | |
Lesion | |
Ring | |
Root-knot | |
Spiral | |
Stunt | Tylenchorhynchus spp. |
(And graft-transmissible pathogens [GTP])
Disease | Pathogen |
---|---|
Rose flower break | Undetermined [GTP] |
Rose leaf curl | Virus suspected |
Rose mosaic | May be caused by any of the following, alone or in combination: Ilarviruses (usually Prunus necrotic ringspot virus (PNRSV) and Apple mosaic virus (ApMV)) and Nepoviruses: Arabis mosaic virus (ArMV) and Strawberry latent ringspot virus (SLRV; nematode transmitted) [17] |
Rose ring pattern | Virus suspected [GTP] |
Rose rosette | Rose rosette emaravirus , [18] mite transmitted |
Rose streak | Rose streak virus (RSV) [GTP] |
Wild rose leaf rosette disease | Rose leaf rosette-associated virus (RLRaV) [19] [20] [21] [22] [23] [24] [25] [26] |
Bare-root roses: Plant in late autumn at leaf fall, and from late winter to early spring, before growth resumes. Avoid planting in the middle of winter when the ground is frozen.
Containerised and container-grown roses: Plant all year round, provided the ground is neither frozen, nor very dry.
Miscellaneous diseases and disorders | |
---|---|
Rose flower proliferation | Undetermined |
Rose spring dwarf | Undetermined |
Rose wilt | Undetermined |