Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Survey on Diseases Associated with Rhizome Rot of Ginger

M. M. Islam
Plant Pathology Division, BARI

M. A. Rahman
Plant Pathology Division, BARI

Abstract/ Executive Summary:

A survey was conducted to record the incidence of diseases associated with ginger rhizome rot from several ginger growing areas of Bangladesh. The highest incidence of the disease was observed in Tangail (68.0 %) and the lowest was found in Gazipur (52.0 %). It was 65.0 & 64.0 % in Khagrachari and Nilphamari districts. A total of 1200 rhizome rot disease samples were collected from the field of Rangpur, Nilphamari, Bogra, Tangail, Comilla and Khagrachari districts from which Pythium, Fusarium, Sclerotium and Ralstonia were isolated and identified. Piali samles collected from local market of this area were investigated for wilt infection. Ralstonia solanacearum (67.0 %) was found in the pilai of Madhupur and it was (40.0 %) found in the pilai of Gazipur.

Keywords: Rhizome rot, Gginger, Causal agent

Location: Rangpur, Nilphamari, Bogra, Tangail, Gazipur and Khagrachari

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Diseases, Ginger

Objectives:

The present research work was undertaken to determine the disease incidence and to find out the causal agents of rhizome rot disease of ginger

Methodology:

Six districts were selected where ginger cultivation and production was found to be higher compared to other places. Two Upazila were selected from each district and two villages were surveyed in each Upazila. Five farmers fields were randomly selected from each village. A total of 20 farmers fields were surveyed in each district and finally 1200 samples have been collected. Rhizome rot infected samples were collected randomly from each field and kept separately in polythene bags with proper leveling with address and date. Marketed rhizomes served as pilai was collected from these selected areas in June. Microorganisms associated with rhizome rot were isolated and identified following standard method in the laboratory from field and marketed rizomes. The diseased samples of ginger were washed under tap water and cut into small pieces. All the diseased samples were tested in six different growth media viz. Oat Meal Agar, V8 Juice Agar, Corn Meal Agar, Potato Dextrose Agar, Water Agar, Malt extract and TZC (Tetrazolium chloride) for isolation of pathogens (Fungi and bacteria) associated with rhizome rot diseased samples. Bacterial streaming was also used for bacteria isolation. The petridishes containing diseased samples were incubated at 25 ±1⁰ C for 7 days in incubator. After 7 days all the petridishes were examined first under Steriomicroscope and then under compound microscope. The pathogen were identified following the key books of Zillnisky (1983) and Mathur and Kongsdal (2003). Investigation of pilai (mother seed rhizome) was done 45 days after seed sown. The samples were collected from Nilphamari, Rangpur, Bogra, Tangail, Gazipur & Khagrachari and investigated the pathogens such as fungi & bacteria during July 2013.

Source of Information: Annual Research Report, Plant Pathology Division, BARI--2013-14

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It was observed that the incidence of Rhizome rot ranged from 52 to 68% in different districts. The highest incidence was observed in Tangail (68%) followed by Khagrachari (65) and Nilphamari (64%). The lowest disease incidence was found in Gazipur (52%). Investigation made in the laboratory for pathogens from rhizome rot samples showed that 3 fungal pathogens viz. Pythium aphanidermatum, Fusarium oxysporum and Sclerotium rolfsii; and a bacterium-Ralstonia solanacearum were detected from the collected samples. Pythium spp. proved to be most predominant pathogen among the rhizome rot pathogens. Next predominant pathogen was Fusarium sp.; Sclerotium rolfsii and Ralstonia solanacearum. The results indicate that several pathogens are involved to cause rhizome rot of zinger. In Kerala association of few organisms were reported such as Pythium aphanidermatum and P. myriotylum; Fusarium oxysporum f.sp. zingiberi and Ralstonia solanacearum during a survey for rhizome rot of ginger in 1984 and 1985. The result revealed that Pythium caused maximum rhizome rot incidence in Khagrachari (52.00%), followed by Tangail (46.00%), Nilphamari (41.00%) and Bogra (44.00%). The pathogen caused the lowest infection in Rangpur district (35.00%). The highest (26.00%) infection of Fusarium was observed in Tangail district followed by 25.00% Nilphamari and Rangpur while the lowest infection was found in Khagrachari and Bogra. The incidence of Sclerotium varied from 9.00-23.00% rhizomes in five districts. The pathogen caused the highest 23.00% infection in Khagrachari while only 9.00% rhizome infection was observed in Rangpur. The bacterium- Ralstonia solanacearum was also found in some collected ginger samples. The highest 15.00% association of bacteria was found in Rangpur followed by 12.00% in Nilphamari and 11.00% in Bogra. The bacterial incidence was the lowest 7.00% in Khagrachari may be due to non-stagnant of water in the field than the plain land during rainy season. Results of the present findings showed variation of percentages organisms in different locations. The incidence of Ralstonia solanacearum- wilt causing bacterium from pilai (mother seed rhizome) of ginger at different locations ranges from 40.0-67.0%. The highest infection 67.0 % found in Madhupur followed by 55.0 % in Nilphamri and the lowest (40.0%) incidence recorded in Gazipur preceded by 45.0 % at Bogra during 2013-14 cropping season. This result indicated that selection of disease-free seed rhizome during planting is essential and be the most important criteria to reduce rhizome rot as well as increase yield of ginger.

Knowledge Management: Report/Proceedings