Abstract
The seasonal incidence of pests and their natural enemies in rice ecosystem was studied using yellow and white light traps during kharif 2019 in Annamalainagar. The trap catches were initiated from 34th Standard Meteorological Week (SMW) and the overall catches in the white light trap was the maximum in 36th SMW (113 adults) followed by 35th and 37th SMW. These declined in 44th SMW (36 adults). In yellow light trap, the peak catches were during 37th SMW (62 adults), while the least catch was during 43th week (23 adults). The natural enemies (predators and parasitoids) were noticed during 35th MSW (22 in both the light traps), which increased up to 40th SMW in white, and 39th week in yellow light traps, coinciding with the peak activity of pests. Correlation coefficients of trap catches revealed positive relationships with minimum temperature (0.644, 0.137), and sunshine hours (0.352, 0.214), whereas rainfall exhibited a negative one (-0.252, -0.048).
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