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Effect of Phylloplane Pseudomonas Bacterial Strains Against Sheath Blight of Rice.

Shamima AKter
Senior Scientific Officer
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

To determine the efficiency of bacterial strains on sheath blight suppression and yield of rice. The study was conducted at Universiti Putra Malaysia in Malaysia as a part of PhD project. Virulent isolate of R. solani KLRs16 and two promising Pseudomonas bacterial strains UMB20 and BMB42 were used in this study. Bacterial isolates were immobilized in peat materials as per methodologies. Plants were inoculated artificially by R. solani 3 days before bacterial application. Data were recorded on AUDPC, percent tiller infection, disease progression rate, 100-grain weight. Experiments were laid out RCB with 4 replications. Analysis of variance (ANOVA) was performed using SAS 9.2 (SAS, 1987) to determine the differences in data using LSD at P ≥ 0.05. Application of bacterial strains either individual or mixture significantly reduced the total AUDPC of sheath blight and percent tiller infection compare to untreated plants upon challenge inoculation with R. solani. The total AUDPC obtained from all the treatments had a range from 700.67 to 1042.57. Significantly the highest (1042.57) AUDPC was recorded in untreated control plants and the lowest (700.67) was in strain mixture applied plants. Percent sheath blight suppressions over control were as 32.79%, 32.58% and 21.19% from strain mixture, UMB20 and BMB42 applied plants, respectively. Combined application of bacterial isolates significantly increased the average weight of 100-grain compared to the control. Almost the similar weight of 100-grain was observed in rest of the treatments.

Keywords: Effect, Phylloplane Pseudomonas, Bacterial strains, Sheath blight of rice.

Location: Molecular Lab, Plant Pathology

Start Date: 01-07-2014

End Date: 30-06-2015

Program Area: Pest Management

Commodity: Rice

Objectives:

To determine the efficiency of bacterial strains on sheath blight suppression and yield of rice.

Methodology:

The study was conducted at University Putra Malaysia in Malaysia as a part of PhD project. Virulent isolate of R. solani KLRs16 and two promising Pseudomonas bacterial strains UMB20 and BMB42 were used in this study. Bacterial isolates were immobilized in peat materials as per methodologies. Plants were inoculated artificially by R. solani 3 days before bacterial application. Data were recorded on AUDPC, percent tiller infection, disease progression rate, 100-grain weight. Experiments were laid out RCB with 4 replications. Analysis of variance (ANOVA) was performed using SAS 9.2 (SAS, 1987) to determine the differences in data using LSD at P ≥ 0.05.

Source of Information: BRRI Annual Report 2014-15.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Combined application of bacterial isolates significantly increased the average weight of 100-grain compared to the control. Almost the similar weight of 100-grain was observed in rest of the treatments.

Knowledge Management: Report/Proceedings