BIO-EFFICACY OF SOME NEW GENERATION INSECTICIDES ON Plutella xylostella L IN AND TOXICITY ON TWO NATURAL ENEMIES

C. SELVARAJ¹*, J.S. KENNEDY^2
1Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
²Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
* Corresponding Author : selvaarjun665@gmail.com

Received : 01-01-2017     Accepted : 09-01-2017     Published : 18-01-2017
Volume : 9     Issue : 3       Pages : 3680 - 3682
Int J Agr Sci 9.3 (2017):3680-3682

Keywords : Plutella xylostella, Cauliflower, Newer molecules, Parasitoids
Conflict of Interest : None declared
Acknowledgements/Funding : The authors are thankful to farmer Kathir who providing land for successful conduct of research experiment during hands to conduct the field trials during Aug-Dec, 2014-15 at Thondamutur, Coimbatore, Tamil Nadu
Author Contribution : None declared

Present investigation reports on effect of some newer molecular insecticides viz., Novaluron 10 EC @ 75 g a.i./ha , Flubendiamide 20 WG @ 40 g a.i./ha, Indoxacarb 4.5 SC + Novaluron 5.25 SC @ 80 g a.i./ha, Indoxacarb 14.5 SC @ 60 g a.i./ha , Acephate 75 SP @ 600 g a.i./ha, Cartap hydrochloride 50 SP @ 450 g a.i./ha and Rynaxypyr 18.5 SC @ 30 g a.i./ha was tested against Plutella xylostella (Linnaeus) on cauliflower during Aug-Dec, 2014-15 at Thondamutur, Coimbatore, Tamil Nadu. Cartap hydrochloride@ 450 g a.i./ha was found most effective in reducing the larval population(91.53%) and also recorded highest yield(27.25 t/ha) among all the 7 insecticides tested. Minimal yield was observed in the control plots (14.00 t/ha).Cartap hydrochloride also showed highest acute toxicity towards both the parasitoids with LC 50 value (0.0099& 0.0043) for Trichogramma chilonis Ishii and Chrysoperla zastrovi silemi (Esben-Petersen)respectively.