author(s)
Hashib Ansari and Masarrat Haseeb

abstract
The bioefficacy studies on Phenacoccus solenopsis were studied in laboratory conditions on okra (Abelmoschus esculentus L.) host plant. The study was conducted to evaluate the toxic effect of different insecticides at different concentrations against Phenacoccus solenopsis. Leaf-dip bioassays were achieved to measure the toxicity of combination insecticides and biopesticide. The results revealed that the highest mortality were recorded at 1% concentration of each treatment by Profenophos + cypermethrin (90%), Aza-d 1% (96.67%) followed by chlorpyriphos + cypermethrin (75%) and Aza-d 1% (96.67%) showed the significantly different result as compared to all other treatment. Lowest mortality was recorded by Triazophos + deltamethrin (39.33%), Verticillium (36.67%), Beauveria (34%) and Aza-d 0.1% (23.33%) after 12 hours. LC₅₀ values were calculated, among all the value, 0.025 LC₅₀ at 1% concentration of Azad-d 1500ppm gave the better result as compare to the other value of LC_50. However among all the value of LT₅₀ values among all the value calculated, LT₅₀ 1.2 hour in case of Profenophos + cypermethrin 44EC at 1% concentration was declared best.