Effects of botanicals and acaricides on management of Tetranychus urticae (Koch) in tomato
Bithika Phukan, Sahidur Rahman and Kapil Kumar Bhuyan
An investigation on “Effects of botanicals and acaricides on management of Tetranychus urticae (koch) in Tomato”was carried out under polyhouse and experimental garden of Department of Entomology, Assam Agricultural University (AAU), Jorhat during 2012 and 2013. Evaluation of acaricides viz., profenofos 50EC (250g a.i./ha) and spiromesifen 240 SL (80g a.i./ha) and botanicals viz., bionol (10ml/l), pestoneem (3ml/l and 5ml/l) and eliminix (0.2%,0.3% and 0.4%) were found effective. Spiromesifen 240 SL gave the maximum reduction of 100% in the 7th day after first and second spraying during 2012 and 2013 and was at par with profenofos 50 EC (250g ai/ha) and eliminix (0.4%). However, eliminix (0.2%) was found to be the less effective treatment which resulted only in 50.99 and 43.73 after 7th day of treatment during 2012 and 2013 respectively. All the other treatments were at par in reduction of mites. Economics of the treatment showed that Spiromesifen 240 SL gave the maximum benefit: cost ratio of 1.13 in 2012 and 1.62 in 2013 respectively.