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Response of Npk Fertilizer on the Incidence of Pod Borer, Helicoverpa Armigera (hubner) and Grain Yield of Chickpea

M. Altab Hossain
Regional Agricultural Research Station, Ishurdi, Pabna

M. Z. H. Prodhan
Regional Agricultural Research Station, Ishurdi, Pabna

M. Azizul Haque
Dept. of Entomology, Bangladesh Agricultural University, Mymenshingh, Bangladesh.

Abstract/ Executive Summary:

Different dose of NPK fertilizer had shown both negative and positive influence on pod borer damage. In general, application of low to moderate doses of NPK reduced pod borer damage. Application of higher doses NPK increased pod borer damage compared to untreated control. Pod borer damage reduction by low to moderate doses of NPK fertilizer application ranged from 3.10 to 14.22%. The highest pod damage reduction (14.22%) was found in 20-20-20 kg NPK/ha followed by 40-20-20 kg NPK/ha (14.00%) and 20-40-20 kg NPK/ha (12.42%). While, pod borer damage was increased by higher dose levels of NPK fertilizer application which ranged from 4.34 to 15.81 %. Manuring with NPK fertilizer in chickpea increased grain yield upto 34.62%. The highest yield (1750 kg/ha) was obtained from 20- 40-20 kg NPK/ha, which was statistically identical among levels of NPK application except 20-20-20 kg NPK/ha. The lowest yield (1300 kg/ha) was recorded from control treatment. The highest marginal benefit cost ratio (4.35) computed from the manurial combination 40-20-20 kg NPK/ha followed by 20- 40-20 kg NPK/ha (MBCR 3.73) Manurial combination 40-20-20 kg NPK/ha was found most profitable followed by 20-40-20 kg NPK/ha in considering pod borer damage and yield in chickpea cultivation.

Keywords: Chickpea, Pod borer, NPK Fertilizer and Yield

Location: Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh

Start Date: 00-11-2004

End Date: 00-04-2005

Program Area: Crop-Soil-Water Management

Commodity: Chickpea

Objectives:

The main objective of the study was to determine the effect of different levels of NPK fertilizer in suppressing the pod borer damage in chickpea.

Methodology:

The experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh during rabi seasons of 2004-05. There were three levels of nitrogen (0, 20 and 40 kg N/ha), seven levels of phosphorus (0, 20, 40, 60, 80, 100 and 120 kg P₂O₅/ha) and five levels of potassium (0, 20,40, 60 and 80 kg K₂O/ha) were used in different combinations in 13 treatments viz., T1= 0-0-0, T2 = 20-20-20, T3 = 20-40-20, T4= 20-60-40, T5 = 20-80-40, T6 = 20-100-60, T7= 20-120-80, T8 = 40-20-20, T9 = 40-40- 20, T10 = 40-60-40, T11 = 40-80-40, T12 = 40- 100-60 and T13 = 40-120-80 kg/ha. The experiment was laid out in randomized complete block design (RCBD) with three replications. The treatments were randomly allotted in each block. The unit plot size was 2m x 4m with a distance of 50 cm between the plots and 150 cm between the replications. In unit plots row to row planting distance 50 cm and plant to plant 10 cm. Each unit plot contains 4 rows of 4 meter length. The whole amount of nitrogen, phosphorus and potassium were applied in the form of urea, triple super phosphate and muriate of potash as per treatments as basal at the time of sowing seeds. The seeds of BARI-chola 5 of chickpea were sown on November 30, 2004 in rows with the spacing of 50 cm. The populations of the plant were maintained constant by keeping plant to plant distance of 10 cm. 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 using the following formula: % Pod damage = (Number of damaged pods)/(Total number of pods)x 100

Source of Information: Bangladesh J. Sci. Ind. Res. 44(1), 117-124, 2009

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is inferred that low to moderate dose levels of NPK reduced pod borer damage and higher doses increased borer damage although they were not differed significantly. Manuring with NPK fertilizer in chickpea increased grain yield significantly irrespective of pod borer damage. Considering profitability, manurial combination 40-20-20 kg NPK/ha was found most profitable followed by 20-40-20 kg NPK/ha in chickpea cultivation.

Knowledge Management: Journal