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Development of an Effective Dose of Cypermethrin for Managing Eggplant Shoot and Fruit Borer (leucinodes Orbonalis)

Shahinoor Rahman
Department of Entomology, EXIM Bank Agricultural University, Bangladesh;

Md. Mahbubar Rahman
Department of Entomology,Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

Md. Zinnatul Alam
Department of Entomology,Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

M. Mofazzal Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

Abstract/ Executive Summary:

A study was conducted in the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during November 2012 to April 2013 in order to find out an effective dose of cypermethrin insecticide (that is commonly used in Bangladesh) against Eggplant Shoot and Fruit Borer (ESFB). Including control there were five treatments were used to measure the effectiveness of the particular insecticide based on fruit infestation, total yield and also benefit -cost ratio. Among the different treatments Ripcord (cypermethrin) 10 EC @ 1 ml/l of water sprayed after observing 5% level of fruit infestation and repetition of the same at 15 days interval (T3) performed the best in respect of marketable yield (30.55 t/ha), reduction of fruit infestation over control (77.54%) and also the benefit cost ratio (8.14).

Keywords: Cypermethrin, Effectiveness, Eggplant shoot and fruit borer (ESFB).

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh

Start Date: 00-11-2012

End Date: 00-04-2013

Program Area: Pest Management

Commodity: Insecticide

Objectives:

The present study was undertaken to find out an effective dose of cypermethrin insecticide against ESFB based on fruit infestation, total yield and also benefit-cost ratio.

Methodology:

Location A study was conducted in the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, during November 2012 to April 2013. Design of Experiment The field experiment comprising of four treatments with an untreated control was laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments were: T1 (Ripcord (cypermethrin) 10 EC @ 1 ml/l of water sprayed at 45 DAT and repetition of the same at 7 days interval), T2 (Ripcord (cypermethrin) 10 EC @ 1 ml/l of water sprayed after initiation of 2% level of fruit infestation and repetition of the same at 15 days interval), T3 (Ripcord (cypermethrin) 10 EC @ 1 ml/l of water sprayed after observing 5% level of fruit infestation and repetition of the same at 15 days interval), T4(Ripcord (cypermethrin) 10 EC @ 2 ml/l of water sprayed after observing 5% level of fruit infestation and repetition of the same at 15 days interval), T5 (Untreated control). Data Recording Data were recorded by counting the infested number of fruit and weight during each harvesting and also measure the total infested yield and fresh yield.For calculating percent fruit infestation, data on the number and weight of healthy, infested and total fruits harvested per plot were recorded at each harvest. Harvesting was done nine times throughout the fruiting season (27 February 2013 to 15 April 2013) at an interval of 5 days. Percent fruit infestation (%) at each such harvest was calculated by using formula.

Source of Information: nternational Journal of Biosciences | IJB |ISSN: 2220-6655 (Print) 2222-5234 (Online) http://www.innspub.net Vol. 5, No. 9, p. 354-359, 2014

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Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In this study we found that, Ripcord (cypermethrin) 10 EC @ 1 ml/l of water sprayed after observing 5% level of fruit infestation and repetition of the same at 15 days interval (T3) performed best than the other treatments. As a result it might be a suggestions for the farmers not to use insecticide indiscriminately but the use of minimum level of insecticide for the maximum level of benefit.

Knowledge Management: Journal