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Relationship of Initial Seed Borne Infection of Colletotrichum Corchori and Jute Seed Yield Parameters Under Greenhouse

M. S. Alam
Dept. of Agriculture Extension, Ministry of Agriculture, Dhaka, Bangladesh

M. M. Islam
Pest Management Division, Bnagladesh Jute Research Institute (BJRI), Dhaka, Bangladesh

Abstract/ Executive Summary:

The study was under taken to make an acquisition of knowledge on the relationship of initial seed borne infection of Colletotrichum corchori and jute seed yield parameters under Greenhouse condition. Experiment was conducted at Plant Pathology Department and Greenhouse of Bangladesh Jute Research Institute (BJRI) during July 2011 to April 2012. All together 600 (six hundred) jute seed samples were collected from different sources and categorized as 0.0 %, 5%. 10%, 15%, 20% and 25% initial of pure seed borne infection with C. corchori for further study. Germination of the seed varied significantly and decreased with the increase initial seed borne infection of C. corchori. Germination failure/dead seed, infected seedlings and total dead seed varied significantly and increased with the increase of initial seed borne infection of C. corchori. There were negative relationships between, seed yield parameters of the harvested seeds of CVL-1 produced in Greenhouse with initial seed borne infection of C. corchori. The regression coefficients for germination, plants/pot, seeds/pod and seeds/plant were -1.048, -0.403, -0.756 and -34.24, respectively. On other hand, relationship of infected seedlings and total dead seeds in Greenhouse were positive with the initial seed borne infections of C. corchori and the regression coefficients for infected seedlings and total dead seed were 0.248 and 0.751, respectively. Since, anthracnose of jute caused by fungus Colletotrichum corchori is a seed borne disease and transmit from seed to plant to seed and consequently hamper the quality and yield of fibre and affect the seed quality and seed yield as well and thus necessary precautions should be taken before sowing and after germination of the seeds to produce higher yield and quality jute seed and fibre.

Keywords: Initial seed borne infection, Colletotrichum corchori, Seed yield parameter,Greenhouse

Location: Plant Pathology Laboratory and Greenhouse of Bangladesh Jute Research Institute (BJRI), Dhaka

Start Date: 00-07-2011

End Date: 00-04-2012

Program Area: Pest Management

Commodity: Diseases

Objectives:

To make an acquisition of knowledge on the relationship of initial seed borne infection of Colletotrichum corchori and jute seed yield parameters under Greenhouse condition

Methodology:

The experiments were conducted in Laboratory and Greenhouse of Plant Pathology Department (PPD), Bangladesh Jute Research Institute (BJRI), during the period from July 2011 to April 2012. The variety CVL-1 belonging to local jute (deshi pat) (Corchorus capsularis) was used for conducting the experiments. Altogether 600 seed samples were collected from different locations of Bangladesh out of which were 15 breeders, 5 foundations, 7 certified, 570 farmers seed samples and 3 from Seed Companies. Seed samples were collected from the seed lots of each tie following the rules of ISTA . The collected 600 seed samples of CVL-1 were subjected to germination and health test following blotter method following the International Rules for Seed Health Testing. In this method, 9 cm diameter plastic petridish and Whatman no. 1 filter paper were used. Two hundred seeds were taken randomly and placed on the moist filter paper in eight petridishes. The petridishes with seeds were then incubated at 22±20^oC for 10 days in the laboratory. After incubation, the seeds were examined under stereomicroscope and the fungal pathogens were identified to species level following the keys and expressed as percentage of seeds infected by the pathogens. Collected seed samples from all seed tiers were categorized on the basis of presence of Colletotrichum corchori as follows for conducting further experiment. T₀ = 0.0% initial seed borne infection with C. corchori T₁ = 5.0% initial seed borne infection with C. corchori T₂ = 10.0% initial seed borne infection with C. corchori T₃ = 15.0% initial seed borne infection with C. corchori T₄= 20.0% initial seed borne infection with C. corchori, T₅ = 25.0% initial seed borne infection with C. corchori. Experiments were set in the Greenhouse at the Central Research Station of BJRI using the jute variety CVL-1 with selected levels of seed borne infections of C. corchori. Sixteen inch diameter earthen pots were used for the experiments. Soils collected from the jute fields were sterilized with 4% Formaldehyde solution @ 200 ml/cft of soil. After sterilization, the soils were covered with a polythene sheet for 48 hours. Then the soils were uncovered and kept for 7 days on the sterilized floor of the green house with periodic stirring so that the toxic formalin vapor gets evaporated. Then sterilized soil was used for the pot experiments. Different levels of seed borne infections with C. corchori viz. 0.0%, 5.0%, 10.0%, 15.0%, 20.0%, and 25.0% were used for conducting the experiments. Twenty five seeds were sown in each pot. Thus, altogether 200 seeds were sown in eight pots for each treatment. Two chambers of the green house were used for the experiments. To maintain the sterile condition inside the green house, necessary precautions viz. separate glasshouse was used and pre washed with 4% formaldehyde solution, pots were kept inside the separate glass house, no other seeds or any equipment was kept inside of that glasshouse. Data were recorded as and when necessary. The experiments were conducted using Completely Randomized Design (CRD). Data collected from laboratory and Greenhouse experiments were analyzed following Completely Randomized Design (CRD). Mean comparison among the treatments were compared by Duncan’s Multiple Range Test (DMRT). Relationships were measured using regression equations.

Source of Information: J. Biosci. Agric. Res. 04(01): 31-39

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Anthracnose of jute caused by fungus Colletotrichum corchori is a seed borne disease and transmit from seed to plant to seed and consequently hamper the quality and yield of fibre and affect the seed quality and seed yield as well and thus necessary precautions should be taken before sowing and after germination of the seeds to produce higher yield and quality jute seed and fibre.

Knowledge Management: Journal