author(s)
G Rajeshwari, KRM Bhanu, AK Chakravarthy, V Sridhar and S Mohan Kumar

abstract
Field experiments were conducted to evaluate the efficacy of Biorationals against red spider mites on okra and brinjal at different spray schedule. Altogether eight treatments, i.e. Azadirachtin 10,000 ppm @1ml/l, Lecanicillium lecanii @2g/l, Neem soap @10g/l, Organic salt 30 WS @4 ml/l, Organic salt 30 WS @ 5ml/l, Spinosad 45 SC @0.2 ml/l, Dimethoate 30 EC @1.6 ml/l and one control (no spray) were selected for the experiment. Cumulative mean efficacy on population reduction after 3, 7 and 15 days after spraying indicated that among the different treatments, Organic salt 30 WS @ 5 ml/l was significantly superior and recorded lower mite population (2.59 mites/cm² leaf on okra and 1.98 mites/cm² leaf on brinjal) than other treatments. Whereas, the highest number of mites was recorded in neem soap (5.83 mites/cm² leaf on okra and 4.17 mites/cm² leaf on brinjal).