author(s)
KV Nagarjuna Reddy, Anil Vyas, Gaurang Chhangani and Monica Jat

abstract
Helicoverpa armigera is the most destructive pest of many crops which severely affects both the quality and quantity of produce. Excessive dependence on insecticides has led to the problem of pest resistance and toxic residues. Developing an efficient monitoring system to know the population dynamics of the pest to keep constant vigilance is important. The adult population was monitored with the light and pheromone traps in Horticulture farm, Rajasthan College of Agriculture, MPUAT, Udaipur. The adult moth activities were first noticed from the 33^rd SMW. The mean trap catches were initially low (4.5 per pheromone traps and 14 per light trap) which increased gradually and attained the peak (20.5 per pheromone traps and 95 per light trap) during mid-October (41^st and 42^nd SMW). The pheromone and light trap catches exhibited a negatively non-significant correlation with mean temperature (r = -0.008 and r = -0.0004), while negatively significant correlation with relative humidity (r = -0.658* and r = -0.751*) and rainfall (r = -0.567* and r = -0.632*).