Some epidemiological aspects of post-bloom fruit drop disease (Colletotrichum gloeosporioides) in citrus

1981 ◽  
Vol 98 (1) ◽  
pp. 65-77 ◽  
Author(s):  
T. G. DENHAM ◽  
J. M. WALLER
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
Fruit Drop

Optimization of Growth Conditions of Citrus Anthracnose Agent Colletotrichum gloeosporioides Isolates in Tunisia

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Ben Hadj-Daoud H ◽  
◽  
Ben Salem I ◽  
Boughalleb-M’Hamdi N ◽  
◽  
...  
Keyword(s):  
Morphological Traits ◽  
Laboratory Experiments ◽  
Plant Pathogens ◽  
Colletotrichum Gloeosporioides ◽  
Optimal Growth ◽  
Growth Conditions ◽  
Fruit Drop ◽  
Nutritional Conditions ◽  
Solid Media ◽  
Wide Range

Background: Colletotrichum gloeosporioides is important plant pathogens on a wide range of plant hosts such as citrus causing pre- or post-harvest infections as anthracnose, post-bloom fruit drop, tearstain and stem-end rot on fruit, or wither-tip of twigs. Method: The optimization of growth conditions of this pathogen was performed (solid media, temperature, pH and water potential under laboratory experiments). Results: Our results revealed that the maximum radial growth of C. gloeosporioides was recorded on SDA medium. All isolates were able to grow on PDA at temperatures of 15 and 30°C (over 0.7cm/day). Optimal growth radial was recorded at pH 5, 6, 7 and 8. Similar responses were obtained with both salt types, but, in general, C. gloeosporioides was more tolerant to KCl than NaCl. Conclusion: Studies of cultural, morphological traits of the pathogen are prominent to understand the response of the pathogen in different environmental and nutritional conditions.

Colletotrichum gloeosporioides, a new causal agent of citrus post-bloom fruit drop

2011 ◽  
Vol 131 (1) ◽  
pp. 157-165 ◽  
Author(s):  
Waléria Guerreiro Lima ◽  
Marcel Bellato Spósito ◽  
Lilian Amorim ◽  
Fabrício Packer Gonçalves ◽  
Péricles Albuquerque Melo de Filho
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
Causal Agent ◽  
Fruit Drop

scholarly journals Antifungal activity of some alternative control against mango anthracnose in Senegal

2021 ◽  
Vol 9 (2) ◽  
pp. 239-246
Author(s):  
Yaya Diallo ◽  
P. M. Diedhiou ◽  
Elisabeth Bush ◽  
Mizuho Nita ◽  
Anton Baudoin
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
Sodium Molybdate ◽  
Field Trials ◽  
Control Measures ◽  
Fruit Rot ◽  
The South ◽  
Significant Control ◽  
Fruit Drop ◽  
Short Rainy Season ◽  
Set Up

Mango production in the South of Senegal is exposed to intensive rainfall from late May to October, with high temperature and moisture levels. These conditions are conducive for the development of anthracnose caused by Colletotrichum gloeosporioides (sensu lato) and leading to an absolute necessity for adequate control measures for good quality mango production. Anthracnose disease causes both pre- and postharvest fruit spots and fruit rot as well as premature fruit drop. The purpose of this study was to test the efficacy of several fungicide alternatives (fertilizers and biological control agents) against mango anthracnose in Senegal comparatively to standard fungicides. Field trials were set up in contrasting climates conditions and involved three orchards in the Northern part of the country with a short rainy season and dry climate over 9 to 10 months a year and three other orchards in the Southern part of Senegal with in a humid tropic environment. No anthracnose was recorded in the orchards in northern Senegal. In the south, in contrast, the disease was actual. Among the treatments tested for the control of anthracnose, Sodium molybdate were found effective after fungicides (azoxystrobin and thiophanate methyl). All the alternative treatments to fungicides provided a statistically significant control to the disease as compared to the control

scholarly journals Premature Fruit Drop in Saw Palmettos Caused by Colletotrichum gloeosporioides

Plant Disease ◽  
2001 ◽  
Vol 85 (2) ◽  
pp. 122-125 ◽  
Author(s):  
M. E. Carrington ◽  
P. D. Roberts ◽  
N. V. R. R. Urs ◽  
R. J. McGovern ◽  
T. E. Seijo ◽  
...  
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
The United States ◽  
South Florida ◽  
Genetic Characteristics ◽  
Disease Symptoms ◽  
Saw Palmetto ◽  
Fruit Drop ◽  
Palm Species ◽  
Similar Disease ◽  
Southeastern Coastal Plain

Saw palmetto (Serenoa repens) is a palm species that grows naturally in the southeastern coastal plain of the United States and is most abundant in Florida. Extracts from saw palmetto fruit are sold worldwide in pharmaceutical and dietary supplements in a market valued at $2 billion per year. Lesions on blossoms and fruit and premature fruit drop were first observed in 1996. In 1997, premature fruit drop resulted in 100% loss of fruit in saw palmetto in central and south Florida. In 1998, fruit loss was 8 to 59%. A fungus was consistently isolated from diseased saw palmetto spadices and fruit and identified as Colletotrichum gloeosporioides based on morphological, immunological, and genetic characteristics. Inoculation of spadices of container-produced saw palmettos with C. gloeosporioides resulted in similar disease symptoms and subsequent reisolation of the causal agent. The cross-infection potential of isolates was demonstrated by infection of other hosts. This is the first report of C. gloeosporioides causing disease on saw palmetto.

Colletotrichum Gloeosporioides Species Complex: Pathogen Causing Anthracnose, Gummosis and Die-Back Diseases of Cashew (Anacardium Occidentale L.) In Ghana

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
A. Muntala ◽  
P. M. Norshie ◽  
K. G. Santo ◽  
C. K. S. Saba
Keyword(s):  
Species Complex ◽  
Colletotrichum Gloeosporioides ◽  
Potato Dextrose Agar ◽  
Causal Agent ◽  
Anacardium Occidentale ◽  
Causative Organism ◽  
Pathogenicity Test ◽  
Small Water ◽  
Colletotrichum Gloeosporioides Species Complex

A survey was conducted in twenty-five cashew (Anacardium occidentale) orchards in five communities in the Dormaa-Central Municipality of Bono Region of Ghana to assess the incidence and severity of anthracnose, gummosis and die-back diseases on cashew. Cashew diseased samples of leaves, stem, inflorescences, twigs, flowers, nuts and apples showing symptoms (e. g. small, water-soaked, circular or irregular yellow, dark or brown spots or lesions on leaves, fruits and flowers, sunken surface, especially on the apples, blight, gum exudates) were collected for isolation of presumptive causative organism. The pathogen was isolated after disinfecting the excised diseased pieces in 70% ethanol, plated on potato dextrose agar (PDA) and incubated at 28 oC for 3 to 7 days. The identity of the putative pathogen was morphologically and culturally confirmed as belonging to Colletotrichum gloeosporioides species complex using standard mycological identification protocols. The pathogen had varied conidia sizes of between 9-15 up to 20 μm in length and diameter of 3-6 μm. The conidia were straight and cylindrically shaped with rounded or obtuse ends. The septate mycelium was whitish-grey, velvety and cotton-like in appearance from the top. The results confirmed the presence of the pathogen in the orchards with incidence ranging from 6.9% and 14.0% for gummosis and averaged 22.9% for anthracnose infected orchards. The result of the pathogenicity test confirmed the isolates to be pathogenic on inoculated cashew seedlings and were consistently re-isolated, thereby establishing the pathogen as the true causal agent of the said diseases in cashew trees and thus completed the Koch’s postulate.

METODOLOGIA DE INOCULAÇÃO DE Colletotrichum gloeosporioides EM FRUTOS DE MAMÃO

2012 ◽  
Vol 24 (3) ◽  
pp. 183-188
Author(s):  
Lahyre Izaete Silveira Gomes ◽  
Eduardo Alves ◽  
Enilton Nascimento de Santana ◽  
Hilário Antônio de Castro
Keyword(s):  
Colletotrichum Gloeosporioides
Sign in / Sign up

Export Citation Format

Share Document