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Influence of Morphological Traits on the Incidence of Pod Borer, Helicoverpa Armigera (hubner) in Chickpea

M. A. Hossain
Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh

M. A. Haque
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Ahmad
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

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

Abstract/ Executive Summary:

Influence of plant foliage colour and growth habit; pod size and seed shape on the incidence of pod borer in chickpea was studied at Regional agricultural Research Station, Ishurdi, Pubna, Bangladesh during rabi 2003-04. The pod damage was comparatively less in deep and light green varieties/lines than green varieties. The average pod damage of deep and light green varieties/lines was 10.52% and 11.32%, respectively while in green varieties/lines it was 19.52%. The erect varieties/lines received less pod borer damage (12.74%) than those of semi-spreading (20.34 %) and spreading (19.29%) varieties/lines. The seed damaged in bored pods in erect varieties/lines was (82.85%) which was lower than those of semi-spreading (85.54%) and spreading (84.26%) varieties/lines. The large sized pods were less preferred (11.43%) by pod borer than medium (16.23%) and small (17.13%) ones. The large seeded genotypes received less pod borer damage (11.43%) than those of medium (17.81%) and small (15.73%) seeded genotypes. Ribbed and tuberculate, shaped seeds were least preferred by pod borer than those of wrinkled and tuberculate, wrinkled and smooth and spherical and smooth ones. The line ICCV-95138 received the lowest pod borer damage (8.96%) and provided the highest yield (1866 kg/ha) compared to other lines and released varieties.

Keywords: Pod borer, Chickpea. Damage

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

Start Date: 00-00-2003

End Date: 00-00-2004

Program Area: Pest Management

Commodity: Chickpea

Objectives:

To find out the morphological traits of foliage colour and growth habit; pod size, seed size and seed shape as source of resistance to pod borer damage in chickpea.

Methodology:

The experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh during the rabi season of 2003-04. There were 14 lines and 6 varieties screened against pod borer infestation in relation to morphological traits of plants and seeds. The experiments were laid out in randomized complete block design (RCBD) with three replications. The seeds of respective varieties/lines were sown on November 22, 2003 in rows with the spacing of 50 cm. At final land preparation, 20-40-20 kg NPK/ha was applied as basal. Normal intercultural operations were done. Twenty damaged (bored) pods were randomly collected from each plot of the genotype and recent seed damaged and recovery of fresh seeds(%) from damaged pods were determined. After harvesting, pod and seed size of the respective genotype were determined by measuring length and breadth using slide calipers and then categorized as large, medium and small. The seed shape was determined by visual observation using magnifying glass. The experimental data were analyzed by MSTAT-C software. The per cent data were transformed by square root transformation for statistical analysis. Mean comparisons for treatment parameters were compared using Duncan’s Multiple Range Test (Steel and Terrie, 1960) at 5% level of significance.

Source of Information: Bangladesh Journal of Agriculture, ISSN: 0253-5408, Vol: 32(2), pp. 41-47

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Achievement/Findings:

It is suggested that genotypes having erect growth habit with deep green colour, bearing large pods with wrinkled and tuberculated large seeds should be screened for pod borer resistance.

Knowledge Management: Journal