Diversity of heteropteran plant bugs in field crops surrounding Bangalore region in Karnataka was assessed. The diversityof plant bugs varied in the locations surveyed and in the crops studied. Plant bugs belonging 20 genera under nine families viz., Alydidae, Coreidae, Lygaeidae, Miridae, Plataspididae Pentatomidae, Pyrrochoridae, Reduviidae and Scutellaridae were observed. Plant bugs of fami ly Pentatomidae occurred in greater abundance followed by family Coreidae. Theshield bugs (Pentatomidae) comprised of 29.85% followed by leaf footed bugs (28.35%) (Coreidae). The milk weeds bugs (Lygaeidae), predatory assassin bugs (Reduviidae) and t he Jewel bugs (Scutellaridae) comprised for 2.98% each. Among the crops, beans harbored more number of bugs than others followed by Maize. Geographic variations, habitat and food plants seemed to have influenced the diversity. Molecular characterization of the plant bugs was done and Genbank accession numbers were obtained.