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Efficacy of Imidacloprid and Thiamethoxam for the Management of Yellow Mosaic Disease of Okra

A. Muqit
Professor
Department of Plant Pathology & Seed Science, Sylhet Agricultural University, Sylhet, Bangladesh

K. M. Khalequzzaman
Principal Scientific Officer (Plant Pathology)
Spices Research Centre (SRC), Bangladesh Agricultural Research Institute (BARI), Shibganj, Bogura, Bangladesh

M. Muzahid-E-Rahman
Senior Scientific Officer
Plant Pathology Division, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to test the efficacy of two insecticides and number of sprays to manage yellow mosaic of okra caused by Okra yellow vein mosaic virus in the field through vector management. The experiment was carried out in the research field of Plant Pathology Division, BARI, Joydebpur, Gazipur during summer (April to July) 2010 and 2011. Two insecticides Imidacloprid (Admire) and Thiamethoxam (Aktara) were sprayed 2 to 6 times at 7 day interval to reduce the vector population. Significant reduction in disease incidence and increase in yield was achieved due to application of chemicals. Disease was found to be reduced by 5 to 50% depending on number of sprays. There was no significant difference between the performance of two insecticides in managing the disease. Four to five sprays were required to achieve a good control of the disease.

Keywords: Okra, Yellow mosaic, Imidacloprid, Thiamethoxam, vector

Location: Research field, Plant Pathology Division, BARI, Gazipur, Bangladesh

Start Date: 00-00-2010

End Date: 00-00-2011

Program Area: Pest Management

Commodity: Virus, Okra, Insecticide

Objectives:

To evaluate the efficacy of two insecticides (imidacloprid and thiamethoxam) and number of sprays to manage yellow mosaic disease of okra in the field.

Methodology:

The experiment was conducted in the research field of Plant Pathology Division, BARI, Gazipur during summer (April-July) 2010 and 2011. The variety of okra was BARI Dherosh-1. Two insecticides namely Imidacloprid (Admire) and Thiamethoxam (Aktara) @ 0.1% were sprayed 2 to 6 times at 7 day interval. Spray was started 3 weeks after germination. The unit plot size was 2.5 x 2 m2. Disease severity was calculated on a 1-4 scale where 1 = symptom observed in upper few leaves, 2 = symptoms observed up to mid canopy without apparent stunting, 3 = symptoms observed up to 3/4th canopy with moderate stunting and 4 = symptoms observed in whole plant with severe stunting. The experiment was laid out in a factorial design (two factors) with 4 replications. Factor 1 was insecticide and factor 2 was number of sprays. Data were analyzed with R software for proper interpretation of results.

Source of Information: Int. J. Sustain. Crop Prod., 11(1):1-3, (February 2016); ISSN 1991-3036 (Web Version)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Results of the present investigation clearly demonstrated that neonicotinoid insecticides imidacloprid or thiamethoxam is effective for the management of yellow mosaic disease of okra in the field. For better performance at least 4 to 5 sprays are required.

Knowledge Management: Journal