Impact of elevated CO₂ on rice brown planthopper Nilaparvata lugens (Stal.)

Influence of elevated CO₂ (570±25 ppm) on the rice brown plant hopper (BPH), Nilaparvata lugens (Stal.) was studied in the Free Air Carbon Enrichment (FACE) facility during rainy season 2013. The BPH appeared on the crop during last week of August (35^th Standard Meteorological Week- SMW) that corresponded to 44 days after transplanting (DAT). From 35^th to 38^th SMW, total BPH population under both elevated and ambient conditions did not differ significantly; however, significantly higher BPH population was recorded from 39^th to 44^th SMW under elevated CO₂. The peak incidence was recorded in the second week of October (42^nd SMW) under both the conditions. Significantly higher canopy circumference under elevated condition provided better environmental condition for the BPH multiplication.