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Relative Susceptibility of Different Cultivars of Brinjal to Brinjal Shoot and Fruit Borer

Md. Wahed Baksha
Senior Research Officer (Entomology), Forest Protection D ivi slon, Forest Research Institute. Chittagong.

Md. Ibrahim Ali
Senior Research Officer (Entomology), Forest Protection D ivi slon, Forest Research Institute. Chittagong.

Abstract/ Executive Summary:

The relative susceptibility level of 13 cultivars of brinjal to brinjal shoot and fruit borer was studied. No brinjal cultivar was found to be absolutely tolerant to this pest. On the basis of shoot infestation the cultivars Baromashi, Jhumki, Bogra special, Islampuri, Indian; Muktakeshi, Khatkhetia, Japani, Nayankajal, Singnath and Bogra-2, Bogra-1. D. R. Chowdhury were graded as 'moderately tolerant', 'susceptible' and 'highly susceptible' respectively. In respect of fruit infestation the cultivars Noyankajal, Singnath, Jananl, Jhumki, Indian and Baromashi were ranked as 'moderately tolerant', the cultivars lslampuri, Khatkhatia, Bogra special, Bnqra-2 and Bogra-1 were ,susceptible' and the cultivars D. R. Chowdhury and Muktakeshi were 'highly susceptible'. Considering both shoot and fruit infestation, the cultivars Jhumki, Indian and Baromashi were found superior.

Keywords: Susceptibility,Cultivars,Brinjal shoot, Fruit borer

Location: At the Regional Agricultural Research Station, lshurdi, Pabna

Start Date: 00-00-1978

End Date: 00-00-1980

Program Area: Pest Management

Commodity: Brinjal

Objectives:

To investigate into the controversy and also to make a detailed study of the varietal tolerance of 13 cultivars of brinjal to the pest.

Methodology:

The experiment was conducted at the Regional Agricultural Research Station, lshurdi, Pabna during the rabi seasons of 1978-79 and 1979-80 with 13 cultivars of brinjal viz. Bogra.1, Bogra-.2, Bogra special, Baromashi, D. R. Chowdhury, lslarnpurl, Indian: .Japani, Jhumki, Khatkhatia, Muktakeshi. Nayankaja and Singnath including two exotics viz. indian and Japani. The experiment was laid out in a RCB design with 3 replications in both the years. No spraying of insecticide was done during the course of study. All agronomical and cultural practices were identical in all the treatments. The data were recorded at an interval of 15 days from the first appearance of pest infestation and the collection continued till the final harvest of the crop. The percentage of shoot and fruit infestation was calculated . The means derived from the compiled data of shoot and fruit infestation of two years period were separated by Duncan's New Multiple Range Test..

Source of Information: Bangladesh Journal of Agriculture Vol. 7 No. 3-4, Sap. & Dec. 1982

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the analysis of variance, it revealed that the variations in the percentage of both shoot and fruit infestation were significant at 5%. level. This indicated that there exist definite variations in the level of susceptibility amongst the brinjal cultivars tested. It was further observed that the effect of year was highly significant on both shoot and fruit infestations. The test year 1978-79 was found to be quite: favorable for shoot attack whereas the year 1979.80 was unfavorable. In case of fruit infestation a reverse result was found . A highly significant cultivar x year interaction was noticed in respect of fruit infestation. The fruits of Singnath were found to be least infested during the year 1978-79 but in the year 1979.80, it was those of the cuItivar Nayankajal.

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