A Short Communication on the Reaction of Some Brinjal (Solanum melongena L., Fam. Solanaceae) Varieties to Brinjal Shoot and Fruit Borer Infestation by Leucinodes orbonalis Guen. (Lepidoptera: Pyralidae)
*M.A. Mannan1, K.S. Islam2,M. Jahan2 and M.Z. Islam3
1Entomology Division, Regional Agricultural Research Station, Jamalpur, Bangladesh, 1Department of Entomology, Bangladesh Agricultural University, Mymensingh 2Ph.D student, BAU, Mymensingh, Bangladesh. *Corresponding author: e-mail: wrcjaml@bdonline.com
Accepted in January 2004
Abstract
The morphological characters of 10 different brinjal varieties were evaluated to determine the level of resistance against the brinjal shoot and fruit borer (BSFB), Leucinodes orbonalis Guen (Lepidoptera: Pyralidae). The varieties Singnath Dinajpuri, Singnath long, Khatkhatia round, Khatkhatia long and Muktakeshi were fairly resistant to L. orbonalis while Jumka showed highly resistant to the pest with lowest infestation (7.71%). The level of infestation was moderate in the varieties Singnath Dinajpuri (20.27%), Singnath long (17.14%), Khatkhatia round (18.64%), Khatkhatia long (17.37%) and Muktakeshi (18.28%). The highest infestation was recorded in the varieties Islampuri (36.44%) and Irri-begoon (36.05%). Some morphological characters of brinjal plants and fruits were found to be associated with the level of infestation. The highly resistant variety Jumka had the largest number of seeds and prickles while Islampuri and Irri-begoon containing less number of seeds and prickles appeared as susceptible varieties to L. orbonalis.