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Effect of Insecticides and Vegetable Oil on Tomato Yellow Leaf Curl Virus (tylcv)

A. Muqit
Senior Scientific Officer
Plant Pathology Division, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur-1701

A. M. Akanda
Professor
Department of Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur- 1706

M. A. Bari
Ex. Director
Horticultural Research Center (HRC), BARI, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at the research farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University during winter 2003-2004 to evaluate the efficacy of different pesticides and vegetable oil on Tomato yellow leaf curl virus (TYLCV) in the field. All the chemicals reduced the disease significantly. Disease incidence was reduced by 1.7 to 3 times depending on chemicals. Yield was also increased except in oil. Efficiency of chemical insecticides were better than botanical pesticides or oil but was not significantly higher.

Keywords: Tomato yellow leaf curl virus, insecticides and vegetables oil

Location: The research farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University

Start Date: 00-00-2003

End Date: 00-00-2004

Program Area: Pest Management

Commodity: Tomato

Objectives:

To evaluate the efficacy of different pesticides and vegetable oil on Tomato yellow leaf curl virus (TYLCV) in the field.

Methodology:

The experiment was conducted at the research farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University during winter 2003-04. Seedlings of the tomato variety ‘Ratan’ were raised in the seed bed and 28 day old plants were transplanted on December 4. The disease was identified mainly through visual observation of typical symptoms of TYLCV like upward curling and cupping, with or without marginal chlorosis, smaller leaflets and stunting of the plant . Later on it was confirmed by commercially available TYLCV identification Kit by Neogen Europe Ltd. (UK). The protocol followed was according to the manufacturer’s recommendation. Disease incidence was calculated by the standard formula. Whitefly was monitored by counting them on upper three leaves. Three randomly selected plants were sampled. Counting was started at one week after transplanting and continued up to 6 weeks.
Randomized complete block design (RCBD) was followed with 4 replications. Five treatments comprising T₁ = Imidacloprid (Admire 0.1%, recently introduced in Bangladesh), T₂ = Cypermethrin (Cymbush 0.1%, earlier introduced), T₃ = Azadirachtin (Nimbicidin 0.4%, commercially available neem product recommended as botanical pesticide), T₄ = Soybean oil (1.5%, used for cooking purpose) and T₅ = Untreated Control were used in the experiment. Soybean oil emulsion was prepared by mixing ‘Trix’ (liquid detergent) with oil in equal volume. Five sprays were conducted at 10 day intervals. Spraying was initiated at 20 days after transplanting when disease symptom was observed in the field. Irrigation, staking and other cultural practices were performed as and when necessary. Data on disease incidence (%) were arcsine transformed before analysis.

Source of Information: Int. J. Sustain. Crop Prod. 1(1): 21-23, 2006

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Present investigation proved that Admire is effective in reducing the incidence of TYLCV and increase of yield in tomato. Similarly Nimbicidin can also be used either singly or in rotation with Admire for the management of TYLCV. To the best of our knowledge this is the first report of vegetable oil used as disease suppressing chemical in Bangladesh.

Knowledge Management: Journal