This study examined the perceptions of VEWs, AEOs and contact farmers relative to: 1) promoting group action; 2) effectiveness of VEW visits and; 3) message conveyance and adoption under the T&V system in Mandya district of Karnataka, a state in south India. In addition, whether or not the type ofland (irrigated or dry) farmed by clients was a factor in perceived effectiveness of VEW visits was also examined. The results of the study indicated significant differences between the three group's perceived effectiveness of VEW visits. VEWs perceptions were significantly higher than AEOs and contact farmers for all the three areas. VEWs perceived that they were effective in all the three areas regardless of working in irrigated or dry land areas. Similarly, AEOs were in agreement with VEWs. However, contact farmers perceived that VEWs in irrigated areas were significantly more effective than VEWS in dry land areas.