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Effect of Bio-extract on Induction of Resistance in Rice Plant Against Sheath Blight

F. Begum
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh

M. A. Kashem
Plant Pathology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. Kabir
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh

M. A. Ali
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Bangladesh Institute of Nuclear Agriculture (BINA) farm, Mymensingh to determine the effect of different bio-extracts in controlling sheath blight of rice. The effect of different bio-extracts such as; Rhizoctonia solani, Trichoderma, mixture of R. solani + T. sp., datura and provax (fungicide) were assessed for resistance against sheath blight of rice. The lowest lesion height (0.75 mm) was observed in mixture of R. solani + T. sp. and the highest (14.75 mm) in untreated control. The highest (100%) disease severity decreased in the mixture of R. solani + T. sp. Per cent increased of filled grain and grain weight was the highest in mixture of R. solani + T. sp. Shoot length, panicle length, number of filled grain and weight of grain were found higher in mixture of R. solani + T. sp treated plants and lower in untreated control. Number of unfilled grain was also lower in mixture of R. solani + T. sp and higher in untreated control plants.

Keywords: Sheath blight, Bio-extract, Resistance, Rice

Location: Bangladesh Institute of Nuclear Agriculture campus, Mymensingh.

Start Date: 00-03-2011

End Date: 00-08-2011

Program Area: Pest Management

Commodity: Extract (plant, seed)

Objectives:

To determine the comparative efficacy of plant extract, bio- agents and chemical fungicide against sheath blight of rice.

Methodology:

Different bio-agents and plant parts were collected from the Bangladesh Institute of Nuclear Agriculture (BINA) campus, Mymensingh. Bio-extracts were prepared at the laboratory of Plant Pathology Division and the seeds of Iratom-24 which are susceptible against sheath blight were collected from Plant Breeding Division, BINA, Mymensingh. The experiment was laid out in completely randomized design (CRD) with four replications during March to August 2011. Different treatments applied were suspension of R. solani, macerated extract of Rhizoctonia solani, suspension of Trichoderma sp. macerated extract of Trichoderma sp. mixture of Rhizoctonia solani + Trichoderma sp. datura fruit extract, provax (fungicide) and untreated control. A total of 32 pots (22.5 cm dia) were taken and filled with 8 kg air dried soil. Three seedlings of thirty days old were transplanted in each pot. Intercultural operations were done as and when necessary. Different treatments were prepared as the form of suspension at the ratio of 1:10. The prepared treatments were applied in the pot sequentially at maximum tillering stage and data were collected at panicle initiation and harvesting stages. The plants were inoculated with inoculums by mycelia block placement. Lesion height, shoot length, panicle length, number of unfilled grain, number of filled grain and weight of grain were recorded. The data on different parameters were statistically analyzed using Analysis of Variance (ANOVA) technique to find out the level of significance and grading was done by DMRT.

Source of Information: Bangladesh Journal of Nuclear Agriculture. Vol: 25 & 26: pp: 53-58, ISSN 0258-7130, 2012

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the present study reported that the application of combined treatment reduced disease incidence to a significantly greater extent than the other single treatment. Comparative effect of different treatments on shoot length, panicle length, unfilled grain, filled grain and weight of grain of rice is shown of bio-agents increased grain yield and had good effects on seed setting rate and 1000-grain weight of the rice plants.

Knowledge Management: Journal