Field experiments were conducted at the Horticultural Research Station, Devihosur, Haveri, during 2007-08 and 2008-09 to test the bioefficacy of a new molecule, flubendiamide 20 WG against chilli fruit borers, Helicoverpa armigera (Hubner) and Spodoptera litura (Fb.). The results indicated that among various dosages flubendiamide 20 WG @ 60 g a.i. /ha recorded highest yield of 7.48 q/ha with lowest fruit damage of 3.45 per cent followed by flubendiamide 20 WG @ 40 g a.i./ha (6.72 q/ha), emamectin benzoate 5 SG @ 11 g a.i./ha (7.22 q/ha) and spinosad 45 SC @ 75 g a.i./ha (7.32q/ha). However, standard check carbaryl 50 WP @ 1000 g a.i./ha (6.46 q/ha) was least effective in reducing the incidence of fruit borers.