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Management of Chickpea Pod Borer, Helicoverpa Armigera (hubner) Using Neem Seed Extract and Lambda-cyhalothrin in High BARInd Tract

MS Hossain
On-Farm Research Division, Barind station, Bangladesh Agricultural Research Institute, Rajshahi

MS Islam
On-Farm Research Division, Barind station, Bangladesh Agricultural Research Institute, Rajshahi

MA Salam
On-Farm Research Division, Barind station, Bangladesh Agricultural Research Institute, Rajshahi

MA Hossain
Pulses Research Center, Bangladesh Agricultural Research Institute, Ishurdi, Pabna

MU Salma
Department of Agriculture Extension, Rajshahi

Abstract/ Executive Summary:

Context: Lamda cyhalothrin and neem seed extract can protect chickpea by controlling pod borer Helicoverpa armigera (Hubner). Objective: To find out the effect of neem seed extract and lambda-cyhalothrin application schedule for the effective and economic management of pod borer attacking chickpea. Materials and Methods: The experiments were conducted in High Barind Tract of northern Bangladesh with the application of neem seed extract @ 50 g-l (two and three spraying) and lambda-cyhalothrin. (Karate 2.5 EC) @ 2 ml-l (two and three spraying) and untreated control. The seeds of BARI-Chola 5 chickpea were sown in rows with the spacing of 40 cm. At maturity, all the pods were collected from 10 randomly selected plants from middle rows of each plot. The damaged (bored) and total numbers of pod were counted. The grain yield loss (kg-ha) and percent pod damage were determined. The seed yield of each treatment was converted to kg-ha. Results: The lowest pod damage (2.55%) as well as grain yield loss (34.90 kg-ha) were observed in the treatment where lamda cyhalothrin applied three times at 7 days interval from flowering stage. Chickpea seed yield was maximum (1338 kg-ha) with lamda cyhalothrin sprayed thrice which was identical to sprayed twice (1280 kg-ha). Neem seed extract showed a marginal performance to control chickpea pod borer. The highest marginal benefit cost ratio (3.19) was recorded from lamda cyhalothrin sprayed twice. Conclusion: Lamda cyhalothrin double sprayed with 7 days interval from pod formation stage is the best package in managing pod borer in chickpea considering efficacy and profitability.

Keywords: Chickpea, Pod borer, Pod damage, Pesticides, Yield

Location: Farming System Research and Development (FSRD) site, Bangladesh Agricultural Research Institute (BARI), Kadamshahar, Godagari, Rajshahi

Start Date: 00-00-2008

End Date: 00-00-2009

Program Area: Pest Management

Commodity: Chickpea

Objectives:

To find out the effect of neem seed extract and lambda-cyhalothrin application schedule for the effective and economic management of pod borer attacking chickpea.

Methodology:

The experiments were conducted in the farmer’s field at Farming System Research and Development (FSRD) site, Bangladesh Agricultural Research Institute (BARI), Kadamshahar, Godagari, Rajshahi during Rabi season of 2008-2009 in the HBT. Application of neem seed extract and lambda-cyhalothrin considered as treatments of the experiments which were: T₁ = spraying of neem seed extract @ 50 g-l (two sprayings at 7 days interval starting from pod formation stage), T₂ = spraying of lamda cyhalothrin (Karate 2.5 EC @ 2 ml-l) (two sprayings at 7 days interval starting from pod formation stage), T₃ = spraying of neem seed extract 50 g-l (three spraying at 7 days interval from flowering stage), T₄ = spraying of lamda cyhalothrin (Karate 2.5 EC @ 2 ml-l) (three sprayings at 7 days interval starting from flowering stage), T₅ = untreated control. It was laid out in randomized complete block design with six dispersed replications. The land was fertilized with 12-20-17-10-1 N-P-K-S-B kg/ha (BARC 2005) in the form of urea, triple super phosphate, muriate of potash, gypsum and boric acid, respectively. All fertilizers were applied as basal at the final land preparation. The seeds of BARI-Chola 5 chickpea were sown in rows with the spacing of 40 cm @ 50 kg-ha ranging from 23-25 October 2008. The unit plot size was 3m x 4m with a distance of 100 cm between the plots and 150 cm between the replications. The spraying was done by Knapsck hand sprayer as per treatments. At maturity, all the pods were collected from 10 randomly selected plants from middle rows of each plot and examined. The damaged (bored) and total numbers of pods were counted and the percent pod damage was determined. The grain yield loss (kg-ha) due to pod borer damage of each treatment was calculated according to Hossain et al. (1999). Plants of middle four rows avoiding border rows of each plot comprising 4.8 m2 (1.6 m x 3 m) area was harvested. The pods were then threshed; grains were cleaned and dried in the bright sunshine. The seed yield of selected area was converted to kg-ha. The experimental data were analyzed by MSTAT-C software. The percent data were subjected to square root transformation for statistical analysis. Mean comparisons for treatment parameters were compared using Duncan’s Multiple Range Test (Steel and Torrie1960) at 5% level of significance. The economic analysis was done for gross return, gross margin and marginal benefit cost ratio (MBCR) for different treatments following the method suggested by CIMMYT (1988). For calculating income and benefit the following market prices were used: Karate 2.5 EC = Tk.100.00-100ml, Neem seed = Tk. 50.00-kg and Chickpea = Tk. 40.00-kg, Labour wage for spraying pesticides = Tk.150/day/labour (work 8 h/day).

Source of Information: J. bio-sci. 18: 44-48, 2010 ISSN 1023-8654

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Lambda-cyhalothrin 2.5 EC @ 2 ml-l sprayed two times at 7 days intervals from pod formation stage determined to be the best package in managing pod borer in chickpea considering efficacy and profitability in HBT.

Knowledge Management: Journal