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Studies on Shoot and Leaf Characters of Brinjal Plants and Their Quantitative Relationships with Brinjal Shoot and Fruit Borer (bsfb)

H. Ahmad
Department of Entomology, Bangladesh Agricultural University, Mymensingh-22002, Bangladesh

M. H. Rahman
Department of Entomology, Bangladesh Agricultural University, Mymensingh-22002, Bangladesh

M. A. Haque
Department of Entomology, Bangladesh Agricultural University, Mymensingh-22002, Bangladesh

K. S. Ahmed
Department of Entomology, Bangladesh Agricultural University, Mymensingh-22002, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted with twenty brinjal varieties/lines during October 2007 to May 2008 to identify shoot and leaf characteristics of brinjal plants for their susceptibility/resistance against brinjal shoot and fruit borer infestation. Borer infestation was influenced by different characters of plant shoot and leaf. Various parameters like plant height, stem diameter, number of branches and leaves plant^-1, third leaf length and width were recorded from different varieties used. The shoot infestation rate was found positively correlated with plant height (0.407), stem diameter (0.520), number of branches plant-1 (0.255), number of leaves plant-1 (0.478), third leaf length (0.373) and third leaf width (0.536). Considering all the recorded parameters, the infestation was found minimum on the variety katabegun WS (1.65%) followed by Marich begun S (1.74%).

Keywords: Brinjal shoot and fruit borer, Shoot and leaf characters, Quantitative relationship, Infestation

Location: IPM laboratory of Plant Pathology Department, BAU, Mymensingh

Start Date: 00-10-2007

End Date: 00-05-2008

Program Area: Pest Management

Commodity: Brinjal

Objectives:

1. To find out whether the shoot and leaf characters influencing the infestation rate of BSFB and also their quantitative relationships with infestation which will help to develop resistant/tolerant varieties against this pest.

Methodology:

For the experiment twenty brinjal varieties/lines, collected from IPM laboratory of Plant Pathology Department, BAU, Mymensingh were used. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications and the experimental field was divided into three blocks, each block consisted of twenty lines. The size of the whole field was 40m x 20m. Uniform and healthy seedlings of 45 days old were taken separately from the seedbed, transplanted in the experimental plots maintaining a spacing of 75cm x 60cm between the row to row and plant to plant. Different intercultural operations (weeding, gap filling and irrigation) were accomplished for better growth and development but no insecticide was used. The data on plant height (cm), stem diameter (cm), number of branches and leaves plant^-1, third leaf length (cm) and width (cm) and infestation were recorded at 60, 80, 100 and 120 days after transplantation. The data were analyzed by using MSTATC Package Computer Program and mean difference were adjusted with DMRT.

Source of Information: J. Bangladesh Agril. Univ. 7(1): 29–32, 2009; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It was observed that the higher plant height, stem diameter, third leaf width and more number of leaves increased infestation of BSFB, because more leaves and higher third leaf width may be suitable for oviposition and thick stem associated with succulent, thin cuticle and soft parenchymatous cells may be suitable to bore easily by young larvae. On the other hand, higher number of branches plant^-1 reduced infestation because it may be reduced stem diameter.

Knowledge Management: Journal