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

Md. Iqbal Faruk
Plant Pathology Division, BARI

Md. Abdur Rahman
Plant Pathology Division, BARI

Abstract/ Executive Summary:

The formulated biological control agent Trichoderma harzianum was mass cultured in cow dung based compost materials called Tricho-compost and tested against seedling blight disease of barley caused by soil-borne pathogen Sclerotium rolsfii. The spore suspension of T. harzianum and chemical fungicide Provax were also used for seed treatment. From this study, it was observed that soil amendment with Tricho-compost was found to be the best treatments for reducing seedling mortality, enhancing plant growth as well as getting higher yield of barley. Seed treatment with chemical fungicide Provax and T. harzianum spores suspension was found similar effect for decreasing seedling mortality and enhancing plant growth and yield of barley.

Keywords: Tricho-compost, Seedling blight, Barley

Location: Plant Pathology Division, BARI, Joydebpur, Gazipur

Start Date: 00-00-2014

End Date: 00-00-2015

Program Area: Pest Management

Commodity: Diseases

Objectives:

The present study was undertaken to observe the efficiency of T. harzianum multiplied in compost materials against S. rolfsii of barley

Methodology:

An experiment was conducted in the field of Plant Pathology Division, BARI, Joydebpur, Gazipur during 2014-15. 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 2.8 m x 2 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. The formulated Trichoderma was used in between two layer of compost materials at 100g/m² T. harzianum were cultured in PDA and PBD media and spores were harvested from 10 days old culture and used for seed treatments. Soil was inoculated with S. rolfsii colonized mixture of Grasspea and wheat bran along with mustard oilcake substrates @100g/m²soil 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 of seedling mortality, plant growth parameters such as shoot height, shoot weight, root length and root weight. The yield of barley per unit area was also recorded. Data were analyzed by the computing MSTATC program. Duncan’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--2014-15

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Effects of Tricho-compost on seedling blight disease of barley caused by S. rolfsii were studied. Results showed that soil amendments with Tricho-composts performed better in enhancing the plant growth parameters such as shoot height, shoot weight, root length and root weight of barley which was significantly differed from other treatments. Significantly higher seedling emergence was recorded from different treatment compared to control but among the treatments significant different was not observed. The highest seedling mortality 46.67% was recorded in control treatment and lower seedling mortality was recorded from different treatments. The highest reduction of disease incidence 64.28% was recorded in soil amended with Tricho-compost-1and 2 followed by seed treatment with Provax, and seed treatments with Trichoderma spore suspensions where disease incidence was reduced 60.72%, 60.72%, and 53.57%, respectively compared to control. The highest yield of barley by 2.77 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-1 and 2 having the yield 2.62, 2.29 and 2.23 tha^-1, respectively. The lowest yield was recorded in control plot by 1.61 tha^-1. Barley yield was 41.88% and 38.55% higher compared to control due to application of Tricho-compost-2 and 1 and it was 34.02% due seed treatment with Provax. Seed treatments with Trichoderma inocula-1 and 2 gave 29.69% and 27.80% higher yield compared to control. From this study it was observed that soil amendment with Tricho-compost having the biological control agent T. harzianum is proved to be the best treatments for reducing seedling mortality, increasing plant growth and getting higher yield of barley. 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 barley compared to control treatment. In the present study inhibition of seedling disease caused by soil borne fungal pathogen S. rolfsii by T. harzianum was observed.

This study suggested that soil amendment with Tricho-compost is the best treatment for reducing seedling blight disease caused by S. rolfsii and increasing plant growth and yield of barley. Seed treatment with chemical fungicide Provax and seed treatment with Trichoderma inocula also gave promising results

Knowledge Management: Report/Proceedings