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Effect of Pods Characteristics on Pod Borer (helicoverpa Armigera, Hubner) Infestation in Chickpea

Altaf Hossain
Senior Scientific Officer
Department of Entomology, Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh

Azizul Haque
Professor
Department of Entomology,, Bangladesh Agricultural University, Mymensingh.

M. Z. H. Prodhan
Senior Scientific Officer
Department of Entomology, Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh during rabi 2003-04 to find out the influence of pod morphological traits (like pods technique length and density, pod wall thickness, pod length, breadth, area and number of pods per plant) on pod borer resistance in chickpea. All the traits showed significant influence on pod borer resistance. Pod trichomes length and density showed negative correlation to pod borer damage in chickpea i.e., genotypes having longer pod trichomes and or more pubescent pods received lower pod borer damage. Relationship study between pod wall thickness and pod borer damage indicated negative correlation which suggested the chickpea genotypes having thicker pod wall received lower pod borer damage. Pod length, breadth, and area of respective genotypes showed significant effect in resistance mechanism against pod borer damage. Study showed a negative correlation between the pod length, breadth and area to pod borer damage. The pods having higher length, breadth and area were less preferred by the pod borer. Number of pods per plant also affected pod borer incidence. The study determined a positive correlation between the number of pods per plant and pod borer damage. The genotype having higher pod bearing potentiality received higher pod borer damage.

Keywords: Chickpea, Pod borer, Pod morphological traits, Helicoverpa armigera

Location: Regional Agricultural Research Station, Ishurdi, Pabna.

Start Date: 15-10-2003

End Date: 31-03-2004

Program Area: Pest Management

Commodity: Chickpea

Objectives:

To find out the pod morphological traits as sources of resistance to Helicoverpa pod borer and their relations to pod damage in chickpea.

Methodology:

The experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh during the rabi season of 2003-04. As many as 14 lines and 6 varieties of chickpea were screen against Helicoverpa infestation in relation to pod morphological traits; ICCL 87315, ICCL 87220, ICCL 87322, ICCV 98936, ICCV 98939, ICCV 95138, ICCV 96020, ICCV 97004, ICC 4918, BCX 91040-1, BCX 91042-3, BCX 91044-3, BCX 91043-1, BCX 91040-3, BINA-chola 2, Bina-chola 3, BARI-chola 3, BARI-chola 4, BARI-chola 5 and BARI-chola 6. The experiment were laid out in a Randomized Complete Block Design with three replications. The treatments were randomly allotted to each block. The seeds of respective varieties/lines were sown on November 22, 2003 in rows with spacing of 50 cm. The populations of the plants were maintained constant by keeping plant to plant distance of 10 cm. Individual plot size was 2m × 4m. Each plot contained 4 rows of 4m length. NPK fertilizers @ 20-40-20 kg/ha were applied at final land preparation. Intercultural operations were done as and when necessary. At podding stage of chickpea plants, pod trichomes length was measured by a transplant millimeter scale. To determine the length and breadth of pods in each genotype, 10 pods of each plot of the genotype was randomly collected and measures by using slide calipers. Mean pod wall thickness was obtained from each genotypes. At maturity, all the pods were collected from 10 randomly selected plants from middle rows of each plot and examined. The experimental data analyzed by MSTAT-C software. The present data were transformed by square root transformation for statistical analysis. Mean comparisons for treatment parameters were compared using Duncan’s Multiple Range Test (Steel & Torrie, 1960) at 5% level of significance.

Source of Information: SAARC JOURNAL OF AGRICULTURE, Vol. 6, Issue 1, 2008, pp. 51-60, ISSN 1682-8348, SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Study showed a negative correlation between the pod length, breadth and area to pod borer damage. The pods having higher length, breadth and area were less preferred by the pod borer. Number of pods per plant also affected pod borer incidence. The study determined a positive correlation between the number of pods per plant and pod borer damage. The genotype having higher pod bearing potentiality received higher pod borer damage.

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