Research on Blackspot Pathogen Diplocarpon Rosae (Marssonina Rosae) and Resistance in Rosa

Carlson-Nilsson, B. U.; Davidson, Campbell G.

doi:10.17660/actahortic.2000.508.18

Cited by 4 publications

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“…The occurrence of races within D. rosae has been widely reported (Jenkins, 1955; Bolton & Svejda, 1979; Drewes‐Alvarez, 1992; Black et al , 1994; Wiggers et al , 1997; Debener et al , 1998; Ali et al , 2000; Carlson‐Nilsson & Davidson, 2000; Yokoya et al , 2000). All fungal isolates do not cause the same degree of infection, and all roses do not respond in the same way to a single isolate (Frick, 1944).…”

Section: Races Of Diplocarpon Rosaementioning

confidence: 99%

“…All fungal isolates do not cause the same degree of infection, and all roses do not respond in the same way to a single isolate (Frick, 1944). Studies performed in different countries to evaluate susceptibility of rose species and cultivars to black spot disease give varying results probably because of the presence of different races of the fungus in the different regions (Carlson‐Nilsson & Davidson, 2000). Palmer et al (1966 a ) observed that conidia of Marssonina rosae obtained from two different rose cultivars, growing in the same field, produced inocula of unequal virulence, suggesting the presence of different races.…”

Section: Races Of Diplocarpon Rosaementioning

confidence: 99%

“…and Rosa wichuraiana Crèp (Drewes‐Alvarez, 2003) to mention but a few. Resistance of roses is determined by genotypes but may vary depending on source of inoculum and environmental conditions (Palmer et al , 1966 a ; Knight & Wheeler, 1978 b ; Svedja & Bolton, 1980; Carlson‐Nilsson & Davidson, 2000). Given that gene‐for‐gene interactions have been shown for black spot disease, different pathological races may cause completely different reactions of the host plant.…”

Section: Resistance Of Rosa Species and Cultivars To Diplocarpon Rosaementioning

confidence: 99%

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Detailed description of developmental growth stages of Diplocarpon rosae in Rosa: a core building block for efficient disease management

Gachomo

Kotchoni

2007

Annals of Applied Biology

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Black spot disease of roses caused by the ascomycetous fungus Diplocarpon rosae teleomorph (Marssonina rosae anamorph) is a widespread and devastating disease. Despite considerable progress in the management of black spot disease in the recent years, it is still unclear by which mechanisms this fungus colonises and invades the host system, and without a good knowledge of such infection machineries, it not possible to fully overcome the challenges of D. rosae infection. By exploring research contributions up to date, we highlight in this review the ultrastructure of D. rosae infection cycle in the host cell by emphasising on several aspects related to its in vitro and in vivo germinations, the infection mechanisms of the fungus, the different fungal structures formed in the host cells and the optimum storage conditions for D. rosae to retain its viability and pathogenicity over time. Here, attention is particularly focused on the asexual life cycle of D. rosae, with the sexual cycle being briefly discussed. In addition, a new dimension of research approaches to effectively control black spot disease of roses, that is, how to accurately use the advanced biotechnology tools to speed up the current state of the disease management, is proposed here.

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Section: Races Of Diplocarpon Rosaementioning

confidence: 99%

Section: Races Of Diplocarpon Rosaementioning

confidence: 99%

Section: Resistance Of Rosa Species and Cultivars To Diplocarpon Rosaementioning

confidence: 99%

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Detailed description of developmental growth stages of Diplocarpon rosae in Rosa: a core building block for efficient disease management

Gachomo

Kotchoni

2007

Annals of Applied Biology

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Variation in resistance to Marssonina rosae (Lib.) Died. among different Rosa L. cultivars and species including three dogrose species (Rosa sect. Caninae)

Carlson-Nilsson

Davidson

2006

Scientia Horticulturae

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Resistance of rose varieties to black spot

Myroshnychenko,

Pikovskyi

2024

PSJ

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Goal. To evaluate the resistance of tea-hybrid and floribunda roses to black spot caused by the fungus Diplocarpon rosae F.A. Wolf. (Marssonina rosae (Lib.) Died.). Methods. Laboratory — for diagnosis of the disease and identification of its causative agent. Field — visual assessment of the distribution and degree of development of black spot (on a 6-point scale) on rose varieties under conditions of a natural infectious background. Mathematical and statistical — to assess the reliability of experimental results. Results. The conducted studies show that during the growing seasons of 2022—2023, black spotting was widespread on all varieties of hybrid tea roses. The intensity of disease development ranged from 30 to 70%. The average lesion score was 1.5—3.5. Ascot, Fiesta and Charming Piano varieties were noted to have the lowest degree of damage (30%). Among roses of the floribunda group, the spread of the disease was in the range of 25—100%, and its development was from 5 to 70%. The average damage score of different varieties was in the range of 0.25—3.5. The least amount of black spotting was seen on plants of the Blu fo Y variety. At the same time, its intensity of damage was 5%. There were no immune groups among rose varieties of two garden groups. Of the 12 varieties of tea-hybrid roses, highly resistant ones were also not found. 3 varieties were resistant, 6 were moderately resistant, and 3 were susceptible. Of the 11 floribunda rose varieties examined, one variety was characterized by high resistance, 3 were resistant, 5 were moderately resistant, and 2 were susceptible. Conclusions. According to the results of screening for resistance to black spot, 23 varieties of garden roses did not find immune roses among them. All studied varieties were affected by the causative agent of the disease D. rosae against a natural infectious background. Among the hybrid tea roses, Ascot, Fiesta and Charming Piano varieties are classified as resistant. The Blue Pho Yu variety (floribunda roses) was characterized by high resistance. Floribunda roses Sim Salabim, Bernstein and Four Elis were resistant to the disease. These varieties can be recommended for use in urban landscaping.

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Research on Blackspot Pathogen Diplocarpon Rosae (Marssonina Rosae) and Resistance in Rosa

Cited by 4 publications

References 0 publications

Detailed description of developmental growth stages of Diplocarpon rosae in Rosa: a core building block for efficient disease management

Detailed description of developmental growth stages of Diplocarpon rosae in Rosa: a core building block for efficient disease management

Variation in resistance to Marssonina rosae (Lib.) Died. among different Rosa L. cultivars and species including three dogrose species (Rosa sect. Caninae)

Resistance of rose varieties to black spot

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