Efficacy of insecticides against sucking pests and yield of Mung bean

The population of jassids, thrips and whitefly increased in the fourth week of April when prevailing temperature ranged between 19.8–41.9°C and relative humidity 43 to 93%. Imidacloprid greatly minimized the population of jassid (1.11in 2010 & 1.08 in 2011/plant) followed by thiomethaxam (1.12 in 2010 & 1.00 in 2011/plant). In case of thrips, thiomethaxam found more effective (1.54 in 2010) and (0.85 in 2011/plant) in managing the pest in comparison to other used insecticides whereas chloropyriphos (2.69) and dimethoate (2.71) had least effect. Acitamiprid (1.19 in 2010 and 1.70 in 2011/plant) noted more effective against the white fly population than thiomethaxam (0.97) and imidacloprid (1.10). Significantly more yield was recorded in the imidacloprid 1633 kg/ha (2010) 1667 kg/ha (2011) than chloropyriphos and acephate. There was only 722 kg/ha yield in 2010 and 813 kg/ha in 2011in control treatment.