Cotton is the most important fibre crop in the world. After the introduction of Bt. Cotton which is resistant to bollworms, the sucking pests incidence has increased. Among the sucking pests, jassids cause more loss.  In the present study, the RILs derived from the cross between Gossypium hirsutum and Gossypium barbadense, both diverse with respect to trichome density, were used to study the trichome density on leaf lamina, mid-rib and leaf vein. There was wide variation for the trichome traits, jassid injury and yield traits among the RILs. The correlation was studied to find the effect of trichomes on the incidence of jassids in the RIL population. The results showed that there was significant negative correlation of jassids per leaf with abaxial leaf pubescence count (-0.16), leaf mid-rib pubescence count (-0.21) and leaf vein pubescence count (-0.17).  The jassid injury was also significantly and negatively correlated with trichome density on leaf lamina (- 0.34), mid-rib (-0.33) and leaf vein (-0.37).