Validation of ipm modules against major pests of okra in Dehradun (Uttarakhand)

Field experiments were carried out at six locations of Vikasnagar Block of Distt. Dehradun (Uttarakhand) during kharif season of 2010 and 2011 with okra hybrid “Sonal” to find out the efficacy of different IPM modules against major pests of okra. The investigations revealed that module (M1) proved be the most effective treatment against shoot and fruit borer, Earias vittella F., yellow vein mosaic virus, Bemisia tabaci (Genn.) and red spider mite, Tetranychus cinnabarinus (Boisd.) in which lowest incidence was recorded as compared to other IPM modules during 2010 and 2011. The module M1 comprised of hand picking and destruction of infested leaves, shoots and fruits, seed treatment with imidacloprid, application of indoxacarb, thiomethoxam, hexythiazox, deep summer ploughing and use of neem cake @ 250 kg/ha before sowing was the most effective. The IPM module (M2) was the next effective treatment against the major pests of okra evaluated at six locations during both the years. The maximum fruit yield was observed in module (M1) i.e. 254.00 and 232.00q/ha, respectively during 2010 and 2011 which was significantly superior over all other treatments. The studies conducted on impact of various IPM modules showed that net return was also higher in module (M1) which was Rs. 182340 and Rs. 165060/ha, respectively during 2010 and 2011. Based on two years studies, it is concluded that judicious use of neonicotinoids pesticides (indoxacarb, thiomethoxam, imidacloprid and hexythiazox) used in module (M1) along with seed treatment kept the pests population below the economic threshold level.