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Effect of Tricho-compost Against Seedling Blight Disease of Wheat Caused by Sclerotium Rolfsii

M. I.Faruk
Plant Pathology Division, BARI

M. A. Rahman
Plant Pathology Division, BARI

Abstract/ Executive Summary:

The formulated biological control agent Trichoderma harzianum was mass cultured in compost materials and tested against seedling blight disease of wheat caused by Sclerotium rolsfii. The spore suspension of T. harzianum was also used as a seed treating agent. It was observed that soil amendment with composts materials containing T. harzianum was found to be the best treatments for reducing seedling mortality, increasing plant growth as well as yield of wheat. Seed treatment with chemical fungicide and seed treatments with Trichoderma spores suspension was found at per with composts for decreasing seedling mortality, increasing plant growth and yield of wheat.

Keywords: Trichoderma, Wheat, Seedling blight

Location: BARI, Joydebpur, Gazipur.

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Diseases, Wheat

Objectives:

The present study was undertaken to observe the efficiency on multiplication of Trichoderma in composting materials and to control S. rolfsii of wheat.

Methodology:

The experiment was conducted in the field of Plant Pathology Division, BARI, Joydebpur, Gazipur. There were 6 treatments viz. (i) seed treatment with provax (ii) seed treatment with Trichoderma spore suspension-1 (iii) seed treatment with Trichoderma spore suspension-2 (iv) soil amendment with Tricho-compost-1, (v) soil amendment with Tricho-compost-2 and (vi) control. The unit plot size was 2.5 m x 3 m. RCB design was followed with 3 replications. T. harzianum was multiplied in the mixture of Grasspea and wheat bran with mustard oilcake substrates. The formulated Trichoderma was used to mass multiplication in the cow dung based composting materials. Two different cow dung based compost materials were used which called Trico-compost-1 and Trico-compost-2. T. harzianum were cultured in PDA and PBD media and spores were harvested from 10 days old cultured and used for seed treatments. Soil was inoculated with S. rolfsii colonized mixture of Grasspea and wheat bran along with mustard oilcake substrates @100g/m² soil before seed sowing. The S. rolfsii inoculated soil was challenged with Tricho-compost @ 3 t/ha. In case of chemical treatment, seeds were treated with provax @ 2.5 g/kg seeds before seed sowing. Data were collected on percentage seedling mortality, plant growth parameters such as shoot height, shoot weight, root length and root weight. The yield of wheat per unit area was also recorded. Data were analyzed by the computing MSTAT program following the standard statistical procedures. Duncun’s New Multiple Range Test (DMRT) was carried out to find out the treatment effects.

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

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest seedling mortality 19.67% was recorded in control treatment. Significantly lower seedling mortality 3.67% and 5.00% was recorded in soil amendments with Tricho-compost-1, 2 and seed treatment with provax, respectively followed by seed treatments with Trichoderma spore suspensions with 6.33% seedling mortality. Soil amendments with Tricho-compost performed to be better in increasing shoot height, shoot weight, root length and root weight which was significantly differed from other treatments as well. The highest yield of wheat by 4.74 t/ha was recorded in Tricho-compost-2 treated plot followed by Tricho-compost-1, seed treatment with provax and seed treatment with Trichoderma inocula-2 where yield was 4.53, 4.09 and 3.99 t/ha, respectively. The lowest yield was recorded in control plot by 3.07 t/ha. Yield was 35.23% and 32.23% higher compared to control due to application of Tricho-compost-2 and 1 and it was 24.94% due to seed treatment with provax. Seed treatment with Trichoderma inocula-1 and 2 gave 23.06% and 19.84%, respectively higher yield compared to control. From this study it is observed that soil amendment with compost materials containing biological control agent T. harzianum is proved to be the best treatments for reducing seedling mortality, increasing plant growth and getting higher yield of wheat. Seed treatment with provax showed similar effect as seed treatments with Trichoderma spore suspensions for reducing seedling mortality and increasing plant growth and yield of wheat compared to control treatment. In bio-control living micro-organisms are employed as antagonist parasites or predators. In the present investigation inhibition of seedling disease caused by soil borne fungal pathogens by T. harzianum. Different workers reported the antagonistic activity of Trichoderma isolates against different phtyopathogenic fungi such as R. solani, F. oxysporum and S. rolfsii.

It may be concluded that soil amendment with Tricho-compost is the best treatment followed by seed treatment with chemical fungicide Provax and seed treatment with Trichoderma inocula for reducing seedling blight disease caused by S. rolfsii and increasing plant growth and yield of wheat.

Knowledge Management: Report/Proceedings