Effect of Different Host Plants on Toxicity of Indoxacarb to Spodoptera litura (Fab.)

Five host crops viz., Castor, Sunflower, Cotton, Groundnut and Soybean belonging to different families were used to study the effect of different host on toxicity of indoxacarb to Spodoptera litura (Fab.) during the year 2011-12 and 2012-13. The larvae reared on Groundnut leaves were found most susceptible to indoxacarb with 0.969 and 1.305 ppm LC₅₀ during 2011-12 and 2012-13 respectively. Whereas, the larvae reared on Castor leaves were found most tolerant with 2.544 and 2.969 ppm LC₅₀ followed by Sunflower (2.510 and 2.795 ppm), Soybean (2.402 and 2.549 ppm) and Cotton (2.210 and 2.413 ppm) during 2011-12 and 2012-13 respectively. The order of toxicity was Castor> Sunflower> Soybean> Cotton> Groundnut. The results suggesting the role of host plants on toxicity of indoxacarb to Spodoptera litura (Fab.).