Abstract

                                Experiments were conducted to assess the biological efficacy of various botanicals, fish oil rosin soap (FORS) and organic salt against spiralling whitefly, Aleurodicus dispersus Russell on brinjal. Two field trials were carried out at Kinathukadavu, Coimbatore district, Tamil Nadu during 2011-2012 (Field trial - 1) and Eastern Block, TNAU, Coimbatore, Tamil Nadu during 2012- 2013 (Field trial - 2). Neem seed kernel extract (NSKE) 5% recorded significantly maximum mortality of A. dispersus at 10 days after treatment (DAT) in both field trial - 1 (79.10 per cent) and field trial - 2 at TNAU, Coimbatore, Tamil Nadu (84.46 per cent) compared to other treatments. Organic salt recorded (74.60 per cent) mortality in field trial - 1, whereas in field trial - 2 azadirachtin 0.03% (77.66 per cent) and neem oil 3% (78.16 per cent) at 10 DAT. CTCRI cassava extract recorded significantly minimum mortality at 10 DAT in field trial - 1 (63.11 per cent), whereas CTCRI cassava extract (68.41 per cent) and organic salt (69.34 per cent) recorded lowest mortality of A. dispersus population in field trial - 2.

Key words : Aleurodicus dispersus, botanicals, fish oil rosin soap, organic salt, bioefficacy, mortality, brinjal