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Study on the Survival Condition of Black Rot (corticium Theae) Disease of Tea in Different Habitant

S. K. Singha
Department of Food Engineering and Tea Technology, Shahjalal University of Scienceand Technology, Sylhet-3114, Bangladesh.

I. Ahmad
Department of Food Engineering and Tea Technology, Shahjalal University of Scienceand Technology, Sylhet-3114, Bangladesh.

R. Uddin
Department of Food Engineering and Tea Technology, Shahjalal University of Scienceand Technology, Sylhet-3114, Bangladesh.

M. S. Islam
Bangladesh Tea Research Institute, Sreemangal, Maulvibazar, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted to find out the survival condition of Black Rot disease (Corticium theae) of tea. Samples and data were collected from the experimental field, BTRI and the causing pathogen of Black Rot (Corticium theae) was detected. In the dormant period after pruning, Corticium theae can be still found in plant debris and pruning litres as the fruiting body which contains spores. These spores are often the dusty and colored part of a fungus that is easily moved in the wind or in water. These spores adhere to and germinate on the tea plant surface, produce germ tubes, followed by the development of germ tubes, and send an infection peg through the cuticle. Following penetration, these fungi initiate sub-cuticularintramural colonization and spread rapidly throughout the tissue with both inter-and intracellular hyphae that kill cells and tissue as they advance.

Keywords: Black rot; Tea; Habitant; Diseases

Location: Bangladesh Tea Research Institute (BTRI), Srimongal, Bangladesh.

Start Date:

End Date:

Program Area: Pest Management

Commodity: Diseases, Tea

Objectives:

To detect black rot (Corticium theae) in different potential sources, assess their capability to infect the tea plants and find out the survival condition of this disease in different habitats.

Methodology:

The study was carried out in the experimental field of Bangladesh Tea Research Institute (BTRI), Srimongal, Bangladesh located between 24.3083°N North latitude and 91.7333°E East longitude in the Sylhet zone. This is one of the major tea growing areas in Sylhetzone situated on an elevation of about 26 m above sea level with a maximum average temperature is 29°C, while the minimum average temperature is 19°C. The total annual average rainfall is 3876 mm. This experiment had conducted at the Department of Food Engineering and Tea Technology, Sylhet, Bangladesh, and Bangladesh Tea ResearchInstitute (BTRI), Srimongal, Moulvibazar, Bangladesh from November to February of pruning season. The Black Rot disease affected tea plant parts were collected from some randomly selected sections of the experimental field. The selected plant parts and surface soil were collected from the field. Every time some plant parts were selected and the whole injured plant was carefully pruned. Pruning liters from the tea field, debris associated with tea plants, and surface soils from the infected sections were collected separately and were taken in the laboratory for further experiments.

Source of Information: Asian Journal of Research in Botany4(4): 68-75, 2020

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This experiment showed that Corticium theae, the causal pathogen of Black Rot, was present in affected tea plant parts. In the dormant period after pruning plant parts like leaves, plant debris, pruning liters, and soil under the affected tea plant contained this pathogen. Pruning liters contain 20%, plant debris 27%, and soil 8% of Corticium theae as the volume in a petri dish. Information on plant pathogen’s (Corticium theae) surviving condition in different habitants would be useful to design appropriate management strategies. Further studies should be done to inactive or increase the dormancy of the fruiting body.

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