scholarly journals Kanker Batang: Penyakit Baru pada Kopi di Lampung

2019 ◽  
Vol 15 (1) ◽  
pp. 9
Author(s):  
Suryo Wiyono ◽  
Andika Septiana Suryaningsih ◽  
Ali Wafa ◽  
Efi Toding Tondok ◽  
Bonjok Istiaji ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Fusarium Solani ◽  
Stem Canker ◽  
New Disease ◽  
Coffee Plantations ◽  
Canker Disease ◽  
Coffee Plants ◽  
Colony Shape ◽  
Canker Pathogens ◽  
Shape And Size

Stem Canker: A New Disease of coffee in LampungStem cancer is a new disease that has attacked smallholder coffee plantations in Lampung since 2010. The cause of the disease was unknown. This study aims to describe the symptoms of the disease, the incidence of the disease in the affected plantation, and identify morphologically and molecularly the canker pathogens of the coffee stem canker diseases. All stages of Koch’s postulate were carried out in laboratories and greenhouses. The isolated pathogens were morphologically characterized by colony shape and color as well as the conidia shape and size. Molecular identification was carried out by using a general primer (ITS1 and ITS4) and followed by sequencing. The main symptoms of the disease are stem cancer and dieback, as well as more infecting older plants. Pathogen of the coffee stem canker disease that attacks coffee plants in Lampung has been identified as Fusarium solani which has 99% homology with F. solani KY245947.1.

Calonectria rigidiuscula. [Descriptions of Fungi and Bacteria].

1964 ◽  
Author(s):  
C. Booth
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Central African Republic ◽  
New Caledonia ◽  
Stem Canker ◽  
British Guiana ◽  
Coffee Plantations ◽  
Robusta Coffee ◽  
Green Point ◽  
North Borneo

Abstract A description is provided for Calonectria rigidiuscula[Nectria rigidiuscula]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Theobroma cacao and many other hosts represented by the following families: Anonaceae, Anacardiaceae, Apocynaceae, Bombacaceae, Euphorbiaceae, Gramineae, Leguminosae, Malvaceae, Meliaceae, Moraceae, Sterculiaceae, Tiliaceae. Also pathogenic on wound inoculation to hosts in the above and following additional families: Bignoniaceae and Ulmaceae (31: 232). DISEASES: Causing die-back and canker of branches associated with capsid injury, 'green-point' cushion gall of buds, and pod rot of cacao; panel decay of Hevea rubber associated with Pbytophthora spp. ; stem canker of robusta coffee associated with Xyleborus morstatta; stem rot of durian; and blight of rice plants including grain. GEOGRAPHICAL DISTRIBUTION: Africa (Cameroons, Central African Republic, Congo, Ghana, Ivory Coast, Madagascar, Nigeria, Sierra Leone); North America [United States (Okla.)]; Central America and West Indies (British Guiana, Costa Rica, Grenada, Guatemala, Honduras, Panama, Trinidad); South America (Argentina, Colombia, Surinam, Venezuela); Asia (Ceylon, India, Indo-China, Java, Malaya, Philippines); Australasia & Oceania (New Caledonia, North Borneo, Tahiti). TRANSMISSION: By air-borne spores, either microconidia produced on recently infected tissue of injured, living stems, or macroconidia from sporodochia on recently dead stems, or ascospores from perithecia produced on long dead stems or cracks in bark (25: 548). The pathogen has been transmitted to cacao cotyledons by means of mealybugs (Pseudococcus njalensis[Planococcoides njalensis] and Ferrisiana virgata[Ferrisia virgata]) in the laboratory, but not elsewhere. Also a soil invader commonly recovered from previous sites of cacao (13: 128, 594) or coffee plantations (34: 179), and in grassland areas (33: 687); seed-borne on rice (32: 449).

scholarly journals Hormesis with glyphosate depends on coffee growth stage

2013 ◽  
Vol 85 (2) ◽  
pp. 813-822 ◽  
Author(s):  
LEONARDO B. DE CARVALHO ◽  
PEDRO L.C.A. ALVES ◽  
STEPHEN O. DUKE
Keyword(s):  
Plant Growth ◽  
Weed Management ◽  
Growth Stage ◽  
Growth Stages ◽  
Coffee Plant ◽  
Herbicide Application ◽  
Coffee Plantations ◽  
Plant Growth Stages ◽  
Coffee Plants ◽  
Almost All

Weed management systems in almost all Brazilian coffee plantations allow herbicide spray to drift on crop plants. In order to evaluate if there is any effect of the most commonly used herbicide in coffee production, glyphosate, on coffee plants, a range of glyphosate doses were applied directly on coffee plants at two distinct plant growth stages. Although growth of both young and old plants was reduced at higher glyphosate doses, low doses caused no effects on growth characteristics of young plants and stimulated growth of older plants. Therefore, hormesis with glyphosate is dependent on coffee plant growth stage at the time of herbicide application.

scholarly journals First Report of Stem Canker Disease of Pitaya (Hylocereus undatus and H. polyrhizus) Caused by Neoscytalidium dimidiatum in Taiwan

Plant Disease ◽  
2012 ◽  
Vol 96 (6) ◽  
pp. 906-906 ◽  
Author(s):  
M. F. Chuang ◽  
H. F. Ni ◽  
H. R. Yang ◽  
S. L. Shu ◽  
S. Y. Lai ◽  
...  
Keyword(s):  
New York ◽  
Aerial Mycelium ◽  
Its Region ◽  
Stem Canker ◽  
Canker Disease ◽  
First Report ◽  
Neoscytalidium Dimidiatum ◽  
Succulent Plant ◽  
Sterile Medium ◽  
Hylocereus Undatus

Pitaya (Hylocereus undatus and H. polyrhizus Britt. & Rose), a perennial succulent plant grown in the tropics, is becoming an emerging and important fruit plant in Taiwan. In September of 2009 and 2010, a number of pitaya plants were found to have a distinctive canker on stems. The disease expanded quickly to most commercial planting areas in Taiwan (e.g., Pintung, Chiayi, and Chunghua). Symptoms on the stem were small, circular, sunken, orange spots that developed into cankers. Pycnidia were erumpent from the surface of the cankers and the stems subsequently rotted. After surface disinfestation with 0.1% sodium hypochloride, tissues adjacent to cankers were placed on acidified potato dextrose agar (PDA) and incubated at room temperature for 1 week, after which colonies with dark gray-to-black aerial mycelium grew. Hyphae were branched, septate, and brown and disarticulated into 0- to 1-septate arthrospores. Sporulation was induced by culturing on sterile horsetail tree (Casuarina equisetifolia) leaves. Conidia (12.79 ± 0.72 × 5.14 ± 0.30 μm) from pycnidia were one-celled, hyaline, and ovate. The internal transcribed spacer (ITS) region of ribosomal DNA was PCR amplified with primers ITS1 and ITS4 (2) and sequenced. The sequence (GenBank Accession No. HQ439174) showed 99% identity to Neoscytalidium dimidiatum (Penz.) Crous & Slippers (GenBank Accession No. GQ330903). On the basis of morphology and nucleotide-sequence identity, the isolates were identified as N. dimidiatum (1). Pathogenicity tests were conducted in two replicates by inoculating six surface-sterilized detached stems of pitaya with either mycelium or conidia. Mycelial plugs from 2-day-old cultures (incubated at 25°C under near UV) were inoculated to the detached stems after wounding with a sterile needle. Conidial suspensions (103 conidia/ml in 200 μl) were inoculated to nonwounded stems. Noninoculated controls were treated with sterile medium or water. Stems were then incubated in a plastic box at 100% relative humidity and darkness at 30°C for 2 days. The symptoms described above were observed on inoculated stems at 6 to 14 days postinoculation, whereas control stems did not develop any symptoms. N. dimidiatum was reisolated from symptomatic tissues. To our knowledge, this is the first report of N. dimidiatum causing stem canker of pitaya. References: (1) P. W. Crous et al. Stud. Mycol. 55:235, 2006. (2) T. J. White et al. Page 315 in: PCR Protocols: A Guide to Methods and Applications. M. A. Innis et al., eds. Academic Press, New York, 1990.

Teratosphaeria stem canker disease on Eucalypt in Italy

2018 ◽  
Vol 153 (2) ◽  
pp. 503-515
Author(s):  
Salvatore Vitale ◽  
Laura Luongo ◽  
Etienne G. J. Danchin ◽  
Giovanni Mughini ◽  
Maria Gras ◽  
...  
Keyword(s):  
Stem Canker ◽  
Canker Disease

Successful Medical Management of Recalcitrant Fusarium solani Keratitis: Molecular Identification and Susceptibility Patterns

2012 ◽  
Vol 174 (3) ◽  
pp. 233-237 ◽  
Author(s):  
Hande Taylan Sekeroglu ◽  
Elif Erdem ◽  
Meltem Yagmur ◽  
Ramazan Gumral ◽  
Reha Ersoz ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Fusarium Solani ◽  
Medical Management ◽  
Susceptibility Patterns

scholarly journals Variability of agronomic characters related to resistance to stem canker (Phytophthora palmivora) on duku (Lansium domesticum) along Batanghari River, Sumatra, Indonesia

2019 ◽  
Vol 20 (4) ◽  
pp. 1127-1132
Author(s):  
ISLAH HAYATI ◽  
SURYO WIYONO ◽  
WIDODO WIDODO ◽  
SOBIR SOBIR
Keyword(s):  
Similarity Index ◽  
Stem Canker ◽  
Phytophthora Palmivora ◽  
Morphological Identification ◽  
Agronomic Characters ◽  
Canker Disease ◽  
Second Stage ◽  
Randomized Design ◽  
Two Stages ◽  
Lansium Domesticum

Abstract. Hayati I, Wiyono S, Widodo, Sobir. 2019. Variability of agronomic characters related to resistance to stem canker (Phytophthora palmivora) on duku (Lansium domesticum) along Batanghari River, Sumatra, Indonesia. Biodiversitas 20: 1127-1132. Duku (Lansium domesticum Correa) is a tropical favorite fruit in South East Asia, including Indonesia. However, currently stem canker disease caused by Phytophthora palmivora Butler (Butler) has been a serious problem on duku plant in Indonesia, especially in Jambi Province. Since duku is vegetatively propagated, selecting resistant mother trees is an effective approach to overcome the disease. This research was aimed to identify mother trees and their progenies that resistant to stem canker pathogen. The research was conducted in two stages. The first one was morphological identification of healthy-looked mother trees grown at four locations: three in Batanghari and one in Muaro Jambi District. The second stage was analyzing resistant seedling progeny of mother trees identified at the first stage. At the second stage, 3 month old seedlings were inoculated with P. palmivora, isolated from rhizosphere of trees grown at the researchs location using Completely Randomized Design. The research found 19 healthy mother trees, and showed similarity index of 0.40 based on eleven identified agronomic characters of mother trees. Cluster analysis revealed 2 identified clusters of mother trees with the identified clusters were independent of plant growth locations. Seedling resistant analysis showed that there were only 5 seedlings expressing resistant traits. Correlation analysis showed that the resistant seedlings were originated from mother trees which tend to have longer leaves, more fruits per branch, more yields, and bigger canopies. This information of the characters can possibly become future reference to choose resistant plant as sources of mother trees to develop and maintain duku populations along the Batanghari River.   

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