Exobasidium vexans Massee, Bulletin of Miscellaneous Informations of the Royal Botanical Gardens Kew () [MB#]. PDF | On Jan 1, , nghe and others published Morphological and Molecular Differences of Exobasidium vexans Massee. Blister blight (causal agent, Exobasidium vexans) is an economically devastating disease of tea (Camellia sinensis). To determine what.
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This will help to protect your privacy. Finally the stem bends over and breaks off at the affected spot Petch, Removal of shade also helped to control the disease in Taiwan Liau, The tea industry in southern India suffered enormous crop losses in the early years of blight Vexanz Rao, Catalogue of Rxobasidium CoL. However, others suggest that some infection can actually lead to an increase in quality Rajalakshmi and Ramarethinam, This plant disease article is a stub.
Specimen record 2. The basidiospores of this pathogen are very sensitive, direct exobasdium in excess of 4 hours will readily destroy them, therefore other agricultural methods such as planting rows greater distances apart to allow sunlight to penetrate to young target leaves can be helpful in controlling disease spread.
Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations.
Transactions of the British Mycological Society. This Add-on is available at http: Register new name species, genus, family, etc Register new type specimen of existing taxa epitype, neotype, etc. On the upper side of the leaf, the spots slowly become sunken into a shallow depression; at the same time on the under-side they become correspondingly convex, forming the typical blister lesion. No other cookies than the ones mentioned above are used on our websites.
Exobasidium vexans is an obligate pathogen of tea, which makes the study of it difficult. Most browsers are initially set up to accept cookies, since this is required by most website owners in order to access their sites. Current name Classification Type name Basionym Obligate or homotypic synonyms Anamorph synonyms Teleomorph synonyms Facultative or heterotypic synonyms Type of organism.
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If you would like to know more about cookies and how they work, please visit www. The mature two-celled basidiospores are very easily dislodged from the sterigmata and are usually to be found on the vexabs of the blister. It thrives in humid high elevations in Asia. Bernard Jabas 1 and Dr. It thrives exobasiduim tea growing regions of Asia with elevations over m and high relative humidity. Exobasidium vexans Massee, Kew Bulletin There are many methods of control throughout Asia, with varying levels of success.
The disease also affects the tender and young green stems.
Basidiomycota >> Ustilaginomycetes >> Exobasidiales >> Exobasidium vexans
Vexnas are sent to a computer by website operators or third parties. This Ustilaginomycotina -related article is a stub. Although the basidiospore is normally one-septate, as many as three septa have been seen in germinated spores.
Reitsma and van Emden refer to these tiny infection spots as stages in the disease. More Spanish version Dr. Fungal plant pathogens and diseases Tea diseases Ustilaginomycotina Fungi described in Ustilaginomycotina stubs Plant disease stubs. Continuing to use www. This disease causes serious crop losses under inclement weather conditions besides affecting quality of made tea.
The view is expressed that the extra septa are normally formed during germination. This is to ensure that we give you the best experience possible. Exobasidium vexans is an obligate pathogen of Camellia sinensiscausing a disease commonly known as Tea Vdxans Blight.
Camellia blister blight (Exobasidium vexans ) on tea (Camellia sinensis ) –
Views Read Edit View history. These cookies allow us to see information on user website activities including, but not limited to page views, source and time spent on a website. Lily Eurwilaichitr and Dr. The information is depersonalized and is displayed as numbers, meaning it cannot be traced back to individuals. Run Zhang 1 and Dr. The upper concave surface of the lesion is smooth and shiny, whereas the lower convex surface is at first dull, then grey and finally pure white, due to a dense, velvety growth on which the spores are produced.
Affected tea leaves can often be distorted, folded or irregularly rolled, owing to the development of the blister lesions on the mid-rib and the margin.
Between and the annual loss amounted to 18 kilotonnes of tea, before control measures were fully implemented on an extensive scale Venkata Ram, Application of diluted polyoxin, an antibiotic, has also had some success at control and inhibition of the disease.
It is vvexans each time there is a query done.