scholarly journals Micromycetes on climbing roses leaves (Rosa L.) in the Botanic Garden of the Jagiellonian University in Cracow

2015 ◽  
Vol 50 (1) ◽  
Author(s):  
Maria Kowalik ◽  
Klaudia Duda-Franiak
Keyword(s):  
Alternaria Alternata ◽  
Black Spot ◽  
Growing Season ◽  
High Abundance ◽  
Botanic Garden ◽  
Epicoccum Nigrum ◽  
Diplocarpon Rosae ◽  
Sordaria Fimicola ◽  
Penicillium Brevicompactum

<p>Micromycetes inhabiting the leaves of 20 cultivars of climbing roses (<em>Rosa</em> L.), grown in Botanic Garden of the Jagiellonian University in Cracow was investigated in the three successive years of research. Sixty-five taxa of of micromycetes was recorded with a few species dominating: <em>Alternaria alternata</em>, <em>Epicoccum nigrum</em>, <em>Pestalotia rosae</em>, <em>Penicillium brevicompactum</em> and <em>Sordaria fimicola</em>, accompanied by various other microfungi. A high abundance of rose black spot caused by <em>Diplocarpon rosae</em> was also observed. The affected leaves revealed advancing necrosis, substantially enhancing at the end of the growing season. Defoliation took place from June to October. Micromycetes inhabiting the leaves of climbing roses in Botanic Garden of the Jagiellonian University in Cracow considerably deteriorated the decorative aspect of the plants.</p>

scholarly journals Micromycetes colonizing and damaging leaves of evergreen rhododendron (Rhododendron L.) in nursery

2015 ◽  
Vol 32 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Maria Kowalik ◽  
Barbara Kierpiec-Baran ◽  
Klaudia Duda-Franiak
Keyword(s):  
Aspergillus Niger ◽  
Species Composition ◽  
Alternaria Alternata ◽  
Ornamental Plants ◽  
Good Health ◽  
Epicoccum Nigrum ◽  
Susceptibility To Infection ◽  
Trichoderma Koningii ◽  
Sordaria Fimicola ◽  
Humicola Grisea

In May and October 2010–2012, mycological studies were conducted on 10 cultivars of rhododendron bushes growing in containers in the nursery of ornamental plants. Out of 3000 specimens of infested leaf fragments, 2566 fungal colonies belonging to 41 species were isolated. The following species colonizing the leaves and causing their necrosis were extracted in the largest number of colonies: <em>Alternaria alternata</em>, <em>Aspergillus niger</em>, <em>Epicoccum nigrum</em>, <em>Humicola grisea</em>, <em>Pestalotiopsis sydowiana</em>, <em>Phoma pomorum</em>, <em>Sordaria fimicola</em>, <em>Trichoderma koningii</em>, <em>Trichoderma polysporum</em>, <em>Truncatella truncata</em>, <em>Umbelopsis isabellina</em> and others. The research showed that the micromycetes colonies colonizing and damaging rhododendron leaves varied in species composition and number of colonies in different years and at different times. The study determined which rhododendron cultivars were characterized by good health and which had the greatest susceptibility to infection by micromycetes.

scholarly journals Diversity of fungi colonizing leaves of Rhododendron (Rhododendron L.) cuttings

2014 ◽  
Vol 67 (1) ◽  
pp. 21-26
Author(s):  
Barbara Kierpiec-Baran ◽  
Małgorzata Żołna ◽  
Maria Kowalik
Keyword(s):  
Alternaria Alternata ◽  
Home Gardens ◽  
Large Majority ◽  
Mucor Hiemalis ◽  
Epicoccum Nigrum ◽  
Trichoderma Koningii ◽  
Aspergillus Brasiliensis ◽  
Green Areas ◽  
Sordaria Fimicola ◽  
Ornamental Shrub

<p>Rhododendrons (<em>Rhododendron</em> L.) are shrubs whose attractiveness is determined by their multi-coloured flowers and evergreen leaves. Necroses visible on the leaves of rhododendron cuttings diminish the suitability of nursery material for marketing. These symptoms are most frequently caused by fungi. The investigations were conducted in 2010–2011 in an ornamental shrub nursery to identify fungi colonizing the phyllosphere of rhododendron cuttings and causing leaf necroses. The material for analysis consisted of leaves of 11 rhododendron cultivars. 550 leaves were collected from 110 half-year-old cuttings for mycological analysis. Over 350 fungal colonies belonging to 15 species were isolated from the leaves of rhododendron cuttings. The dominants included: <em>Pestalotiopsis</em> <em>sydowiana</em>, <em>Trichoderma koningii</em> and <em>Alternaria alternata</em>. The influents included: <em>Aspergillus brasiliensis</em>, <em>Mucor hiemalis</em> f. <em>hiemalis</em>,<em> Epicoccum nigrum</em>, <em>Sordaria fimicola</em> and <em>Umbelopsis isabellina</em>. A large majority of the fungi preferred the phyllosphere environment of Yakushima rhododendron (<em>R. yakushimanum</em>) cultivars ‘Sneezy’ and ‘Golden Torch’ as well as of the large-flowered cultivars ‘Flautando’, ‘Dominik’, and ‘Simona’. The phyllosphere of the large-flowered cultivars ‘Bernstein’, ‘Nova Zembla’, and ‘Goldbuckett’ was a reservoir for many fungal colonies and fungi species. The cultivars less susceptible to colonization by fungi and the most promising for planting in green areas and home gardens are the large-flowered cultivars ‘Bernstein’, ‘Nova Zembla’, ‘Goldbuckett’, ‘Rasputin’, and ‘Roseum Elegans’.</p>

scholarly journals Management of Black Spot of Rose with Winter Fungicide Treatment

Plant Disease ◽  
2001 ◽  
Vol 85 (4) ◽  
pp. 393-398 ◽  
Author(s):  
K. L. Bowen ◽  
R. S. Roark
Keyword(s):  
Disease Onset ◽  
Black Spot ◽  
Growing Season ◽  
University Campus ◽  
Disease Symptoms ◽  
Plant Vigor ◽  
Systemic Fungicides ◽  
Flower Production ◽  
Diplocarpon Rosae ◽  
A Site

Fungicides were evaluated for their efficacy against black spot of rose, caused by Diplocarpon rosae, when applied during winter months to hybrid tea rose plants in two studies. One study, conducted at two Auburn University campus sites, consisted of applications of horticultural oil, chlorothalonil plus an antitranspirant, and cyproconazole, along with nontreated plants; one site included triforine applications. Rose canes were treated two and three times between late October and February in 1996-97 and 1997-98, respectively; then plants were examined every 2 to 4 days beginning in mid-February for onset of symptoms of black spot. In both years, winter applications of fungicides (chlorothalonil, cyproconazole, and triforine) delayed disease onset compared with treatments without fungicides (nontreated and oil applications). Decreased plant defoliation, as well as improved plant vigor, were observed through the 1998 growing season following fungicidal winter treatments at campus sites; winter treatments with oil did not suppress disease compared with no treatment. In a second study started in November 1997, at a site near Shorter, AL, three systemic fungicides (myclobutanil, cyproconazole, and triforine) were applied to rose canes during the winter; nontreated plants were included. Decreased disease symptoms and defoliation of rose plants were observed early in the 1998 and 1999 seasons following winter applications of cyproconazole and triforine compared with myclobutanil or nontreated plants. Winter treatments with these fungicides did not consistently provide season-long reduction of black spot. However, season-long plant vigor and flower production on plants were improved at the Shorter site following winter applications of any of the above systemic fungicides compared with nontreated plants.

scholarly journals Antimicrobial and Antibiofilm Activities of the Fungal Metabolites Isolated from the Marine Endophytes Epicoccum nigrum M13 and Alternaria alternata 13A

Marine Drugs ◽  
2021 ◽  
Vol 19 (4) ◽  
pp. 232
Author(s):  
M. Mallique Qader ◽  
Ahmed A. Hamed ◽  
Sylvia Soldatou ◽  
Mohamed Abdelraof ◽  
Mohamed E. Elawady ◽  
...  
Keyword(s):  
Alternaria Alternata ◽  
Antibacterial Effect ◽  
Saline Lake ◽  
2D Nmr ◽  
Fungal Metabolites ◽  
Gram Positive ◽  
Gram Negative ◽  
Epicoccum Nigrum ◽  
Wadi El Natrun ◽  
New Compounds

Epicotripeptin (1), a new cyclic tripeptide along with four known cyclic dipeptides (2–5) and one acetamide derivative (6) were isolated from seagrass-associated endophytic fungus Epicoccum nigrum M13 recovered from the Red Sea. Additionally, two new compounds, cyclodidepsipeptide phragamide A (7) and trioxobutanamide derivative phragamide B (8), together with eight known compounds (9–16), were isolated from plant-derived endophyte Alternaria alternata 13A collected from a saline lake of Wadi El Natrun depression in the Sahara Desert. The structures of the isolated compounds were determined based on the 1D and 2D NMR spectroscopic data, HRESIMS data, and a comparison with the reported literature. The absolute configurations of 1 and 7 were established by advanced Marfey’s and Mosher’s ester analyses. The antimicrobial screening indicated that seven of the tested compounds exhibited considerable (MIC range of 2.5–5 µg/mL) to moderate (10–20 µg/mL) antibacterial effect against the tested Gram-positive strains and moderate to weak (10–30 µg/mL) antibacterial effect against Gram-negative strains. Most of the compounds exhibited weak or no activity against the tested Gram-negative strains. On the other hand, four of the tested compounds showed considerable antibiofilm effects against biofilm forming Gram-positive and Gram-negative strains.

scholarly journals First report of Alternaria black spot of rose caused by Alternaria alternata in China

2019 ◽  
Vol 102 (1) ◽  
pp. 273-273
Author(s):  
Peihong Fang ◽  
Shaochuan Shi ◽  
Xintong Liu ◽  
Zhao Zhang
Keyword(s):  
Alternaria Alternata ◽  
Black Spot ◽  
First Report

scholarly journals Fungal diseases of Rose plant in Bangladesh

2014 ◽  
Vol 38 (2) ◽  
pp. 225-233 ◽  
Author(s):  
Anita Ghosh ◽  
Shamim Shamsi
Keyword(s):  
Aspergillus Flavus ◽  
Alternaria Alternata ◽  
Trichoderma Viride ◽  
Black Spot ◽  
Fungal Diseases ◽  
Rhizopus Stolonifer ◽  
Penicillium Sp ◽  
Botrytis Allii ◽  
Fusarium Sp ◽  
Academy Of Sciences

Five types of symptom were recorded on two varieties of rose plant. The symptoms were Black spot, Leaf spot1, Leaf spot2, Blight and Anthracnose. The study revealed the presence of 20 species of fungi belonging to 17 genera. The isolated fungi were Alternaria alternata (Fr.) Keissler, Arthrinium saccharicola Stevenson, Aspergillus flavus, Link., A. niger van Tiegh., Botrytis allii Munn, Cercospora sp., Cladosporium cladosporioides (Fresen.) de Vries, C. oxysporum Berk. & Curt., two species of Colletotrichum, Curvularia brakyospora Boedijn, Curvularia pallescens Boedijn, Fusarium sp., Epicoccum purpurascens Ehreneb ex Schlecht; Link, Gibberella sp., Marssonina rosea (Lib.) Died, Nigrospora sphaerica (Sacc.) Masson, Pestalotiopsis guepinii (Desm.) Stay. with its two culture types, Penicillium sp., Rhizopus stolonifer (Ehrenb. Ex. Fr) Vuill. and Trichoderma viride Pers. ex Fries. The frequency (%) of association of P. guepinii was higher than any other fungi. Pestalotiopsis guepinii and its two culture types were found to be pathogenic to rose plant. DOI: http://dx.doi.org/10.3329/jbas.v38i2.21347 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 2, 225-233, 2014

scholarly journals Benzyl isothiocyanate fumigation inhibits growth, membrane integrity and mycotoxin production in Alternaria alternata

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1829-1837
Author(s):  
Tiaolan Wang ◽  
Yongcai Li ◽  
Yang Bi ◽  
Miao Zhang ◽  
Tingting Zhang ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Alternaria Alternata ◽  
Membrane Integrity ◽  
Black Spot ◽  
Causal Agent ◽  
Benzyl Isothiocyanate ◽  
Mycotoxin Production

The antifungal activity of benzyl isothiocyanate (BITC) against pear pathotype-Alternaria alternata, the causal agent of pear black spot, and its possible mechanisms were studied.

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