author(s)
P Venkataramanaiah, SR Koteswara Rao, KV Hari Prasad and M Reddi Sekhar

abstract
Field studies were conducted to evaluate the efficacy of pheromone trap types, height of trap erection, pheromone lure concentrations and replacement period on trap catches of Tuta absoluta in farmers’ field during rabi, 2016-2017 in Piler and Kalikiri mandal of Chittoor district, Andhra Pradesh. Among the three trap types, Delta traps installed at crop canopy level with two milligram lure concentration replaced every one month were caught maximum moth catches of T. absoluta when compared to sleeve and wota T traps installed at crop canopy level, 30 and 60 cm above the crop canopy level. In response to pheromone lure efficacy, two milligram pheromone lure replaced with 30 days interval caught highest moth catches and lowest moth catches recorded at one milligram lure replaced with 45 days interval.