Comparative epidemiology of three Colletotrichum species complex causing Glomerella leaf spot on apple

2020 ◽  
Vol 158 (2) ◽  
pp. 473-484
Author(s):  
Rafaele Regina Moreira ◽  
Armando Bergamin Filho ◽  
Walmes Marques Zeviani ◽  
Louise Larissa May De Mio
Keyword(s):  
Leaf Spot ◽  
Species Complex ◽  
Colletotrichum Species ◽  
Comparative Epidemiology ◽  
Glomerella Leaf Spot

Unraveling Colletotrichum species associated with Glomerella leaf spot of apple

2018 ◽  
Vol 44 (2) ◽  
pp. 197-204 ◽  
Author(s):  
Aline Cristina Velho ◽  
Marciel J. Stadnik ◽  
Matthew Wallhead
Keyword(s):  
Leaf Spot ◽  
Colletotrichum Species ◽  
Glomerella Leaf Spot

scholarly journals Pathogen Dispersal and Glomerella Leaf Spot Progress Within Apple Canopy in Brazil

Plant Disease ◽  
2019 ◽  
Vol 103 (12) ◽  
pp. 3209-3217 ◽  
Author(s):  
Natasha Akemi Hamada ◽  
Rafaele Regina Moreira ◽  
Cristiano Nunes Nesi ◽  
Louise Larissa May De Mio
Keyword(s):  
Leaf Spot ◽  
Weather Conditions ◽  
Water Runoff ◽  
Initial Inoculum ◽  
Colletotrichum Species ◽  
Primary Inoculum ◽  
Species Complexes ◽  
Glomerella Leaf Spot ◽  
Favorable Weather ◽  
Temporal Progress

Glomerella leaf spot (GLS) of apple is caused by three different Colletotrichum species complexes. This study evaluated the dispersal of Colletotrichum spores related to GLS temporal progress and defoliation. Spores were monitored by air and water runoff in different plant heights, and the temporal progress of GLS and defoliation were assessed. Spores of the pathogen were first cached in the lower part of the tree closer to the ground, confirming the importance of dead leaves on the ground as main source of primary inoculum. In plots with high primary inoculum, the disease increases exponentially during favorable weather conditions. The highest initial inoculum was found in the lower part of the tree, but the highest rate of the disease progress in the upper.

scholarly journals Ascospore Infection and Colletotrichum Species Causing Glomerella Leaf Spot of Apple in Uruguay

2019 ◽  
Vol 35 (2) ◽  
pp. 100-111 ◽  
Author(s):  
Sandra Alaniz ◽  
Vanessa Cuozzo ◽  
Valentina Martínez ◽  
Marciel J. Stadnik ◽  
Pedro Mondino
Keyword(s):  
Leaf Spot ◽  
Colletotrichum Species ◽  
Glomerella Leaf Spot

scholarly journals Comparative epidemiology of Pyrenopeziza brassicae (light leaf spot) ascospores and conidia from Polish and UK populations

2004 ◽  
Vol 53 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Z. Karolewski ◽  
N. Evans ◽  
B. D. L. Fitt ◽  
A. Baierl ◽  
A. D. Todd ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Comparative Epidemiology

Bitter Rot of Apple in the Mid-Atlantic US: Causal Species and Evaluation of the Impacts of Regional Weather Patterns and Cultivar Susceptibility

2021 ◽  
Author(s):  
Phillip L. Martin ◽  
Teresa Krawczyk ◽  
Fatemeh Khodadadi ◽  
Srđan G. Aćimović ◽  
Kari Peter
Keyword(s):  
Growth Rates ◽  
Species Complex ◽  
Warming Trend ◽  
The United States ◽  
Weather Data ◽  
Apple Cultivar ◽  
Colletotrichum Species ◽  
Bitter Rot ◽  
Cultivar Susceptibility

Apple growers in the Mid-Atlantic region of the United States have been reporting an increase in losses to bitter rot of apple and are requesting up-to-date management recommendations. Management is complicated by variations in apple cultivar susceptibility, temperature and rainfall, and biology of the Colletotrichum species that cause bitter rot. Over 500 apples with bitter rot were obtained from 38 orchards across the Mid-Atlantic and the causal species identified as C. fioriniae and C. nymphaeae of the C. acutatum species complex and C. chrysophilum, C. noveboracense, C. siamense, C. fructicola, C. henanense, and C. gloeosporioides sensu stricto of the C. gloeosporioides species complex, the latter two being first reports. Species with faster in vitro growth rates at higher temperatures were more abundant in warmer regions of the Mid-Atlantic, while those with slower growth rates at higher temperatures were more abundant in cooler regions. Regional bloom dates are earlier and weather data shows a gradual warming trend that likely influenced, but was not necessarily the main cause of the recent increase in bitter rot in the region. A grower survey of apple cultivar susceptibility showed high variation, with the increase in acres planted to the highly susceptible cultivar ‘Honeycrisp’ broadly corresponding to the increase in reports of bitter rot. These results form a basis for future studies on the biology and ecology of the Colletotrichum species responsible, and suggest that integrated bitter rot management must begin with selection of less-susceptible apple cultivars.

scholarly journals A novel miRNA negatively regulates resistance to Glomerella leaf spot by suppressing expression of an NBS gene in apple

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Yi Zhang ◽  
Qiulei Zhang ◽  
Li Hao ◽  
Shengnan Wang ◽  
Shengyuan Wang ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Novel Mirna ◽  
Glomerella Leaf Spot

Differentiation of Isolates of Glomerella cingulata and Colletotrichum spp. Associated with Glomerella Leaf Spot and Bitter Rot of Apples Using Growth Rate, Response to Temperature, and Benomyl Sensitivity

2005 ◽  
Vol 6 (1) ◽  
pp. 6 ◽  
Author(s):  
Eugenia González ◽  
Turner B. Sutton
Keyword(s):  
Growth Rate ◽  
Leaf Spot ◽  
Molecular Diversity ◽  
Colletotrichum Gloeosporioides ◽  
Glomerella Cingulata ◽  
Optimum Growth Temperature ◽  
Bitter Rot ◽  
Colletotrichum Spp ◽  
Glomerella Leaf Spot ◽  
Response To Temperature

Cultural characteristics were investigated as a way to distinguish isolates of Glomerella cingulata and Colletotrichum spp. associated with Glomerella leaf spot and bitter rot of apples from those that cause only bitter rot. The growth rate, response to temperature, and benomyl sensitivity of 27 isolates of Glomerella cingulata, 12 isolates of Colletotrichum gloeosporioides, and 7 isolates of C. acutatum, collected from apple orchards located in the U.S. and Brazil and previously characterized based on morphology, vegetative compatibility, and mitochondrial DNA (mtDNA) haplotypes, were determined. These isolates represent the genetic and molecular diversity within isolates of C. gloeosporioides, C. acutatum, and G. cingulata from apples found in a previous study. Slower growth, lower optimum growth temperature, and less sensitivity to benomyl distinguished isolates of C. acutatum from isolates of G. cingulata and C. gloeosporioides. However, growth rate and benomyl sensitivity were not useful for distinguishing between G. cingulata and C. gloeosporioides or differentiating isolates of G. cingulata that cause leaf spot and bitter rot from those that only cause bitter rot. Accepted for publication 17 May 2005. Published 19 July 2005.

The effect of hail protection nets on Glomerella leaf spot in ‘royal Gala’ apple

2012 ◽  
Vol 31 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Amauri Bogo ◽  
Ricardo Trezzi Casa ◽  
Leo Rufato ◽  
Mayra Juline Gonçalves
Keyword(s):  
Leaf Spot ◽  
Glomerella Leaf Spot
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