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Morphological characteristics of leaves, shoots and fruits of 5 brinjal varieties/lines viz., BL 099, BARI Brinjal-6, BL 117, BL 072 , BARI Brinjal-1 and wild Solanum torvum were studied at the experimental farm and laboratories of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during the period from September 2004 to April 2005 in a randomized block design with three replications. Higher number of leaves (195.50 plant-1) inviteshigher shoot and fruit infestation which was found positively correlated (r2= 0.55). Higher leaf area (63.53cm2/leaf and leaf trichom (256.7/25mm2) had lower shoot and fruit infestation which was found negatively correlated (R2 =0.65). Among the morphological characteristics of shoots viz., number of shoot, daimeter and length of top inter node have a positive correlation (R2=0.69, 0.85, 0.44) and number of prickles and trichome on shoot have a negative correlation (R2 =0.22,0.70) with BSFB infestation on brinjal shoot. The morphological characters of fruits like fruit per plant, calyx length, fruit length, diameter, shape and color have significant effect on BSFB infestation. Diameter of fruit, weight of fruit has a positive correlation (R2=0.14, 0.10) and length of fruit (R2=0.36) and calyx (R2=0.79) have a negative effect on BSFB attacking brinjal fruit.

Anatomical characteristics of brinjal shoot and fruit of 5 resistance/susceptible brinjal varieties/lines viz. BL 099, BARI brinjal-6, BL 117, BL 072 , BARI brinjal -1 and wild Solanum torvum was studied at the experimental farm and Entomology laboratory of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during the period from September 2004 to April 2005 in a randomized block design with three replications. From the observation it seem that resistant brinjal varieties (BL 099, BARI brinjal-6, BL 117, BL 072 , and wild Solanum torvum ) with thick cuticle, broad and thick collenchymataous area (8-9 layers), compact paranchyma cell, compact arrangement of vascular bundle and small pith area (1.67 mm) showed lower shoot infestation. Where as susceptible variety (BARI Brinjal-1) has thin cuticle and collenchymatous area (6-7 layers), loose pharanchyma cell, poorly develop vascular bundle and large pith area (3.47 mm). The thickness of pericarp and mesocarp were positively correlated (R2=0.64, 0.38) with the degree of fruit damage.The percent of fruit infestation decreases with the increases in number of seed per gram flesh of brinjal fruit. The variety having compact seed ring (BL009 and wild S.torvum with closely arranged seeds in mesocarp showed less infestation while variety with less compact seed ring with distantly arranged seed (BARI Brinjal-1) suffered more fruit infestation.