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Efficacy of Rhizobium Strains and Biofertilizers for Controlling Foot and Root Rot and Increasing Green Pod Yield of Bush Bean

K. M. KHALEQUZZAMAN
Senior Scientific Officer
Plant Pathology Division, Regional Agricultural Research Station, BARI, Ishurdi, Pabna

I. HOSSAIN
Professor
Department of Plant Pathology, BAU, Mymensingh, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted during 2002-03 in the infested plot of the BINA sub-station at Ishurdi, Pabna to evaluate the effectiveness of Rhizobium strains and biofertilizers in controlling the foot and root rot disease, and to increase green pod yield of Bush bean under field condition. The highest germination (91.6%) was recorded with BINAR P36, which was statistically similar to BAUR 107, BARIR 7029, BARIR 1000, BINAR P6 and BINA biofertilizer. The lowest germination (77.9%) was found in untreated control. The highest foot and root rot (24.5%) was observed in untreated control and the lowest (10.00%) was in BINAR P36. Biofertilizers and Rhizobial strains decreased foot and root rot upto 59.2% over untreated control. The highest green pod yield (20.8 t/ha) was obtained for using BINAR P36, which was followed by BARIR 7029, BARIR 892, BARIR 1000, BINAR P6 and BINA biofertilizer. The lowest green pod yield (13.6 t/ha) was found in untreated control. Rhizobium strain BINAR P36 may be used as seed treatment for controlling foot and root rot and increasing green pod yield of Bush bean.

Keywords: Rhyzobium, Biofertilizers, Foot and root rot, Bush bean.

Location: BINA sub-station at Ishurdi, Pabna

Start Date: 00-00-2002

End Date: 00-00-2003

Program Area: Crop-Soil-Water Management

Commodity: Bio fertilizer

Objectives:

The present research was undertaken to examine the effect of Rhizobium strains and biofertilizers for controlling foot and root rot disease and to increase green pod yield of Bush bean.

Methodology:

The experiment was carried out during 2002-2003 in the foot and root rot infested plot of the BINA sub-station. The experiment was conducted following RCBD with three replications. The size of individual unit plot was 2 m × 2 m. The test variety was BARI Bush bean 1. Twelve Rhizobial strains (BAUR 975, BAUR 424, BAUR 349, BAUR 107, BAUR 979, BARIR 7029, BARIR 892, BARIR 301, BARIR 1000, BARIR 609, BINAR P6 and BINAR P36) and three biofertilizers (BAU biofertilizer, BARI biofertilizer and BINA biofertilizer) were used for treating seeds. The crop spacing was 30 cm x 15 cm. The seeds were dipped in Rhizobial broth for 15 minutes (Somasegaran and Hoben, 1994). In the case of biofertilizers, seeds were initially moistened with molasses at the rate of 50 g per kg seed. Then the seeds were thoroughly mixed with biofertilizer (50 g/kg seed), where each biofertilzer contained 10 Rhizobial cells/mg (Somasegaran and Hoben, 1994). In the case of control, seeds were not treated with Rhizobium strains or biofertilizers. The inoculant-coated seeds were sown in the afternoon. The plots were inspected regularly to record foot and root rot disease development from the seedling stage until maturity. The diseased plants were collected and examined for identification of pathogens. Intercultural operations were done as and when necessary. Two irrigation were done. No chemicals (insecticides or fungicides) were used for controlling pests and diseases. Data were recorded on germination (%), foot and root rot (%), seedling vigour, number of nodules/plant, plant height, green pods/plant and green pod yield. Vigour index (VI) or seedling vigour was calculated for 15 days’ old seedlings (Baki and Anderson, 1973): Vigour index (VI) = (Mean shoot length + mean root length) x Germination (%) Data were subjected to statistical analysis for mean values and test of significance. The variations among the means were compared following Duncan’s Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: Bangladesh J. Agril. Res. 33(3): 617-622, December 2008 ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It may be concluded that Rhizobium strain BINAR P36 largely controlled the foot and root rot and produced higher green pod yield of Bush bean. This strain may be used for production of biofertilizers and be used as seed treatment for controlling foot and root rot and increasing green pod yield of Bush bean.

Knowledge Management: Journal