Report on Choanephora cucurbitarum inciting twig blight of chilli under Coastal Odisha condition in India

2021 ◽  
Author(s):  
Sangeetha Ganesan ◽  
Udayendu Barik ◽  
Supriya Sahu ◽  
Naresh Ponnam
Keyword(s):  
Twig Blight ◽  
Choanephora Cucurbitarum

scholarly journals First report of twig blight of ban tulsi (Croton bonplandianus Bail.) caused by Choanephora cucurbitarum (Berk. & Ravenel) Thaxt. in India

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Siddhartha Das ◽  
Subrata Dutta ◽  
Sujit Kumar Ray
Keyword(s):  
Present Report ◽  
Monsoon Season ◽  
Disease Incidence ◽  
Severe Disease ◽  
First Report ◽  
Rdna Its ◽  
Rdna Its Sequences ◽  
Twig Blight ◽  
Choanephora Cucurbitarum ◽  
Blight Disease

Abstract In August 2015, twig blight disease of ban tulsi (Croton bonplandianus Bail.) caused by Choanephora cucurbitarum (Berk. & Ravenel) Thaxt. was observed for the first time, in the Gangetic alluvial region of West Bengal, India. A severe disease incidence (40-50%) showed twig blight symptoms starting with shoot apical meristem (SAM), leaf, and blossom blight symptoms. Typical symptoms were characterized by over-projecting black pin head like emerging sporangiola which formed mycelial cushion on the infected surface. The present report describes the identification of the causal pathogen as C. cucurbitarum based on its morphology and the internal transcribed spacer of its ribosomal DNA (rDNA - ITS) sequences with 100% identity of NCBI-GenBank published Choanephora database. Optimum temperatures, 28-30°C, coupled with high relative humidity (80-90%) during the monsoon season enhances the disease’s progress. To the best of our knowledge this is the first report of twig blight of C. bonplandianus, caused by C. cucurbitarum, in India as well as globally.

scholarly journals Investigation of Fungi Causing Twig Blight Diseases on Peach Trees in South Carolina

Plant Disease ◽  
2019 ◽  
Vol 103 (4) ◽  
pp. 705-710 ◽  
Author(s):  
Martha H. Froelich ◽  
Guido Schnabel
Keyword(s):  
South Carolina ◽  
Fungal Pathogens ◽  
Management Strategies ◽  
Brown Rot ◽  
Cambium Layer ◽  
Twig Blight ◽  
Botryosphaeria Obtusa ◽  
Peach Trees ◽  
Moderately Resistant ◽  
Prevalent Species

A survey of fungal pathogens causing twig blight on commercial peach trees was conducted in South Carolina in the fall of 2016. Shoots with cankers, pycnidia, and dieback were collected from six locations around the state. Isolates obtained from these samples were identified as Botryosphaeria obtusa, Phomopsis amygdali, Leucostoma persoonii, and Cytospora sp., based on colony morphology, conidia size and shape, and ribosomal DNA sequence analysis. L. persoonii was the most prevalent species and was isolated in five of the six locations, followed by P. amygdali and B. obtusa. The sensitivity of representative isolates of B. obtusa, P. amygdali, and L. persoonii to fungicides of different FRAC codes was evaluated. All species tested were sensitive to thiophanate-methyl (FRAC 1) and pyraclostrobin and azoxystrobin (both FRAC 11), whereas all species were resistant to boscalid and fluopyram (both FRAC 7). P. amygdali and B. obtusa were sensitive to difenoconazole and propiconazole (both FRAC 3), whereas L. persoonii was moderately resistant. L. persoonii was the most virulent species based on expansion of mycelium in the cambium layer of 2-year-old, detached twig pieces. Bacterial spot (BS)-sensitive cultivar ‘O’Henry’ was most susceptible to B. obtusa compared with BS-sensitive ‘Summerprince’, brown rot (BR)-resistant ‘Contender’, and BR-sensitive ‘Coronet’ but was least susceptible to L. persoonii. Coronet was most susceptible to L. persoonii. There were no significant differences between susceptibility of the cultivars to P. amygdali. This study established that L. persoonii is currently the most frequent twig blight pathogen in South Carolina, perhaps owing to its superior fitness. Some fungicides were effective in controlling all twig blight pathogens and may therefore be useful for chemical management strategies. Our study also provides the first evidence that the genetic basis of resistance to BS and BR in peach trees is not necessarily linked to tolerance to wood pathogens.

Lophodermium oxycocci. [Descriptions of Fungi and Bacteria].

2005 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
British Columbia ◽  
Czech Republic ◽  
New Jersey ◽  
Geographical Distribution ◽  
Chemical Control ◽  
Vaccinium Macrocarpon ◽  
Economic Damage ◽  
Twig Blight

Abstract A description is provided for Lophodermium oxycocci. Information is included on the disease, cranberry twig blight, caused by the organism, that can cause serious economic damage to commercial cranberry crops in Oregon and Washington. Some information on cultural and chemical control is given, along with details of its transmission, geographical distribution (Canada (British Columbia), USA (Alaska, Maine, Massachusetts, Michigan, New Jersey, Oregon and Washington), Russia, Czech Republic, Finland, France, Germany, UK, Poland, Sweden and Ukraine) and hosts (Vaccinium macrocarpon, Vaccinium sp. and V. oxycoccus).

Epicoccum purpurascens. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
C. Booth
Keyword(s):  
Geographical Distribution ◽  
Sweet Corn ◽  
New Records ◽  
Brown Rot ◽  
Animal Tissue ◽  
Wide Range ◽  
The World ◽  
Twig Blight ◽  
Specific Parasite ◽  
Β Carotene

Abstract A description is provided for Epicoccum purpurascens[Epicoccum nigrum]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: plurivorous. DISEASE: The species usually occurs as a saprophyte or weak parasite although there are a number of reference to its occurance as a specific parasite. It occurs on a wide range of plants and plant material, human and animal tissue and processed foodstuffs. Generally regarded as a saprophyte or weak parasite but it has been listed as causing leaf spot of cassava (48, 2104), twig blight of Asiatic chestnuts (51, 1193) and because of its reddish-brown pigments (Β-carotene, torularhodin and rhodo-xanthin) it has been referred to as causing 'Red Kernel' disease of sweet corn (54, 2217), Red Blotch of rice (13, 538) and Brown Rot of apple. GEOGRAPHICAL DISTRIBUTION: Although new records of its distribution are constantly being published its range is probably world-wide wherever vegetation occurs. The CMI has material from all the major regions of the world and collections too numerous to list here. TRANSMISSION: Spores of the species are amongst the commonest components of the air spore (51, 1193) and have been frequently isolated from seeds of rice (53, 135), millet (53, 3004) and cereals in general.

scholarly journals First Report of Twig Blight Caused by Fusarium proliferatum on ‘Yanfu 3’ Apple

Plant Disease ◽  
2020 ◽  
Vol 104 (11) ◽  
pp. 3075-3075
Author(s):  
D. Wang ◽  
Y. Zhang ◽  
H. Zhai
Keyword(s):  
Fusarium Proliferatum ◽  
First Report ◽  
Twig Blight
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