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Leaf Characters of Brinjal Influencing the Infestation Rate of Brinjal Shoot and Fruit Borer

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

K.S. Ahmed
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202,

T. Akter
Department of Zoology, Jahangirnagar University, Saver, Dhaka, Bangladesh

I.J. Khan
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202,

M. Mone
Department of Plant pathology, Bangladesh Agricultural University, Mymensingh-2202,

Abstract/ Executive Summary:

A field experiment was conducted with sixteen brinjal varieties/lines at the Plant Pathology Farm, Bangladesh Agricultural University (BAU), during the period from October 2008 to May 2009 to identify their characteristics for susceptibility/resistance against brinjal shoot and fruit borer infestation. Different leaf characters of plants showed significant relation among the tested varieties/lines. Correlation value indicated that the shoot infestation increased with the increase of number of leaves plant^-1 and third leaf length; while shoot infestation decreased with the increase of third leaf width. Fruit infestation also increased with the increase of number of leaves plant^-1. The fruit infestation rate decreased with the increase of both length and width of third leaf.

Keywords: Leaf length, Width, Leaf number, Shoot infestation, Fruit infestation.

Location: Plant Pathology Farm, Bangladesh Agricultural University (BAU)

Start Date: 00-10-2008

End Date: 00-05-2009

Program Area: Pest Management

Commodity: Brinjal

Objectives:

1. To minimize the use of synthetic insecticides and problems arising due to their frequent use, it is very much essential to identify the plant morphological characters of different varieties influencing the infestation rate of brinjal shoot and fruit borer.

Methodology:

Sixteen brinjal varieties/lines viz. Singnath, Borka, Kaikka-G, Dohazari-G, Chega, Menter, Bholanath, Jessore-L, Ishurdi WS, Laffa-BAU, Thamba, Marichbegun-S, Katabegun-WS, ISD-006, China oblong and Wild were screened for brinjal shoot and fruit borer resistance in the Plant Pathology Farm of BAU during October 2008 to May 2009. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications for each. The experimental field was divided into three blocks and each block consisted of sixteen lines. The treatments were randomly assigned to the block. All agronomic practices and recommended fertilizers were used. No insecticidal control measure was taken. Five plants from each plot were selected at random. The number of leaves plant^-1 was counted at 40, 70, 100 and 120 DAT. The third leaf length and width were recorded by meter scale. Statistical analysis was done by using MSTAT Package Computer Program and mean differences were adjusted with DMRT. To determine the extent of interaction between brinjal shoot and fruit borer infestation and brinjal plant characters, correlation matrix for all possible data combinations was worked out. Correlation coefficient was further partitioned into characters of direct and indirect effects by path coefficient analysis taking all the characters into consideration. Brinjal shoot and fruit borer infestation was considered resultant variable.

Source of Information: J. Agrofor. Environ. 4 (2): 69-72, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Experimental information on correlation is particularly useful for measuring the relationship among the variables. In case of shoot, infestation rate was found to be positively correlated with number of leaves plant^-1 (0.291) and third leaf length (0.011). The shoot infestation rate was recorded negatively correlated with third leaf width (-0.106). The results indicated that the shoot infestation increased with the increased of number of leaves plant^-1 and third leaf length and shoot infestation decrease with the increase of third leaf width.

Knowledge Management: Journal