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Study of Insect Transmission of Jute Leaf Mosaic Virus and Management Through Use of Insecticide

A. H. M. M. Haque
Senior Scientific Officer
PRC, BARI, Joydebpur, Gazipur

R. Saha
Department of Plant Pathology, BAU, Mymensingh

M. M. Alam
Senior Scientific Officer
Regional Agricultural Research Station, BARI, Ishurdi, Pabna

K. M. Khalequzzaman
Senior scientific officer
Regional Agricultural Research Station, BARI, Ishurdi, Pabna

L. Yasmin
Scientific Officer
HRC, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted in the field of department of plant pathology, BAU, Mymensingh during April to September, 2006 to study the insect transmission and management through use of insecticide and to evaluate the relationship of white fly population with the spread of jute leaf mosaic virus. It was observed that the causal agent is readily transmissible through Bemisia tabaci (White fly) in three capsularis species. The transmission rate depended on cultivars. Symptom bearing plants of CV. D-154 gave the highest 24% and 35% symptom for both sprayed and non sprayed plot respectively. In the field experiment it was revealed that the disease incidence was more in non sprayed plots than sprayed plots, indicating vector (white fly) transmission as positive. The rate of increasing disease incidence was higher up to 45 days than later.

Keywords: Causal agent, Jute cultivars, Transmission,Management

Location:

Start Date: 00-04-2006

End Date: 00-09-2006

Program Area: Pest Management

Commodity: Virus

Objectives:

To study the insect transmission and management through use of insecticide and
To evaluate the relation ship of white fly population with the spread of jute leaf mosaic virus.

Methodology:

The experiment was conducted in the field laboratory, department of plant pathology. Bangladesh Agricultural University (BAU), Mymensingh during the period form April, 2006 to September, 2006. The soil belonged to the old Brahmaputra flood plain characterized by sandy loam with a pH valor of 6.5. Seeds were collected from the breeding division of Bangladesh Jute Research Institute (BARI), Dhaka. The land was opened by ploughing with power tiller then it was ploughed and cross ploughed several times by a country plough until the soil was brought to a good tilth. All the major weeds and other major rubbishes were completely removed from the field. Manures and fertilizers were applied to the experimental field in recommended dose. The experiment was laid out in a Randomized completely Block Design. The experimental field was divided into six plots. The unit plot size was 4 m x 2.5 m. Three cultivars were assigned in each block at random. Treatments were done one plot sprayed and another plot non-sprayed. Each of jute cultivars viz. BJC-83 (V₁), CC-45 (V₂) and D-154 (V₃) was considered as treatment. Seeds were sown on 11^th April, 2006 in line sowing method and the seed rate was 4 kg/ha. The spacing was 25 cm x10 cm. Insecticide (Melathion 60EC @ 0.2%) was applied in present experiment to control vectors/whitefly (Bemesia tabaci) with the help of a hand sprayer for two times at 30 days after emergence (DAE) and 45 DAE in the sprayed indicated plant. Both sprayed and non-sprayed plots were inspected regularly to collect whitefly insect that usually visited jute leaf mosaic plants during the growing period with the help of a sweeping net. Data were collected on present germination, percent leaf mosaic expressed plant at 45 days after sowing (DAS), seed weight per 10 plant (Healthy and diseased). Incidence of mosaic at 30, 45 and 60 DAS and eight seed/plot. Calculation of percent germination using by the formula. Calculation of % mosaic expressing plant using by the formula. Calculation of % mosaic expressing leaf using by the formula. Data were analyzed using the statistical software Mstat-c. Treatment means were compared by DMRT (Duncan’s Multiple Range Tests).

Source of Information: Int. J. Sustain. Crop Prod. 3(6):64-67, 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the present work confirmed that the causal agent was vector (B. tabaci) transmitted. The disease causes loss in seed production as well. These findings would definitely provide clues about the identification of the pathogen. Insecticide was sprayed for the control of whitefly in relation to the incidence of leaf mosaic of jute. It was revealed that timely administering insecticide reduced the incidence and severity of the disease and increased yield and quality. If the crop was not sprayed within 30 days after germination high incidence of leaf mosaic would result low yield.

Knowledge Management: Journal