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Effect of Botanical and Synthetic Pesticides in Controlling Epilachna Beetle and the Yield of Bitter Gourd

M. A. RAHAMAN
Technical Officer (Agriculture)
Partnership in Agricultural Research and Extension (PARE) Program, Mennonite Central Committee (MCC), Bangladesh, Thonthonia, Bogra, 2

M.D.H. PRODHAN
Scientific Officer
Entomology Division, BARI, Joydebpur, Gazipur-1701,

A. K. M. MONJURE MAULA
Agricultural Extension Officer
Department of Agriculture Extension (DAE), Paba, Rajshahi, Bangladesh

Abstract/ Executive Summary:

The study was conducted at the farmers of Mennonite Central Committee (MCC) partner organization namely CVDP (Community Village Development Programme), Sirajgonj during the year 2005-2006 to find out the possibility of the management of epilachna beetle using botanical and synthetic pesticides. A total of three approaches viz., Tephrosia leaf extract (20g fresh leaves/100ml water), Diazinon 60 EC @ 2 ml/L of water and an untreated control were evaluated. The Tephrosia leaf extract performed well for effective control of epilachna beetle with its different stages and also performed highest yield followed by a synthetic pesticide (Diazinon 60 EC). On the other hand the highest plant infestation was observed in untreated control and also performed lowest yield. The Tephrosia leaf extract is inhibiting or killing the beetle and treated as a environment friendly pest control method.

Keywords: Bitter gourd, Epilachna beetle, Botanical and synthetic pesticides, Yield

Location: MCC selected area, Jamuna char, Sirajganj

Start Date: 00-10-2005

End Date:

Program Area: Pest Management

Commodity: Bitter gourd

Objectives:

This experiment was conducted to compare the effect of tephrosia leaf extract with a chemical pesticide for the control of epilachna beetle and on the yield of bitter gourd.

Methodology:

The experiment was conducted at the MCC selected area, Jamuna char, Sirajganj. The trial was set in the mid October, 2005 and laid out in Randomized Complete Block design. The farmer was the beneficiaries of MCC partner organization namely CVDP. The three treatments were as follows- 1. Tephrosia leaf extract (20 g fresh leaf/100ml); 2. Diazinon 60 EC @ 2 ml/L of water (sprayed at 14 days interval), 3. Control Each treatment had five replications. The main plot size was 200.06 m² (14.29 m X 14 m) and it was divided into 15 sub-plots to replicate the treatments. The sub-plot size was 4 m X 2.26 m = 9.04m². 50 cm gap was maintained between two sub-plots and 50 cm drainage canal was maintained around the field. The land was prepared with four ploughing. During final land preparation compost: 80kg/decimal and chemical fertilizer like Urea: 460 g, TSP: 460 g and MP: 230 g per decimal were used. Incase of urea 1/3 dose was used during final land preparation. Rest of urea was used into two splits at vegetative and flowering stage. Seedlings were grown in a well prepared seed bed to raise seedling at a fallow land. The seedlings were transferred into the main field when they were 4-5 leaves stage. In the field, 150 cm distance for plant to plant and 150 cm distance for row to row was maintained. Different intercultural operations like weeding, irrigation, drainage etc were maintained. There were only two hand weeding which was at 15 days after transplanting (DAT) and 35 DAT were maintained. At the maturity stage harvesting was started. The harvest was done for three to four times, because fruits were of different sizes. The first marketable size was being first harvested and the last marketable size was harvested at the last stage. The relevant farmers were involved with all sorts of activities. Trial cost was bearded by MCC-B and finally the farmers took all the benefits. Leaf extract preparation: Only the leaves of the shrub were harvested. 200g fresh tephrosia leaves were taken and crushed and it was mixed with 1 liter of fresh water and soaked in shade for 3-4 hours, than the mixture was strained by a fine cloth. Finally extracted water was mixed with 2 liter of fresh water to make the appropriate volume.

Source of Information: Int. J. Sustain. Crop Prod. 3(5) (August 2008)

Article Link (Online Journal): http://cidsbd.org/wp-content/uploads/2014/03/5.23-26.doc.pdf

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From this experiment it is easily mentionable that the tephrosia leaf extract is doing better among all the treatments for the control of epilachna beetle with its all stages. It is inhibiting or killing the beetle. So, it can say that the use of tephrosia leaf extract may be a method to control the epilachna like pest and to avoid the residual toxicity of the chemical insecticide. For more confirmation this trial is need to conduct further.

Knowledge Management: Journal