Enhancing In Vivo foraging activity of Trichogramma Chilonis Ishii and Chrysoperla zastrowi sillemi (Esben-Peterson) on eggs of Spodoptera Litura (F.) through kairomonic activity of saturated hydrocarbons Parthiban P.*, Chinniah C., Kalyanasundaram M., Baskaran R. K. Murali Department of Agricultural Entomology, Agricultural College and Research Institute Tamil Nadu Agricultural University, Madurai, 625104 *Email: parthitnau@gmail.com
Online published on 4 January, 2018. Abstract Twelve long chain saturated hydrocarbons ranging from C14 to C34 were screened under laboratory condition to find out their efficiency in enhancing the foraging activity of Trichogramma chilonis Ishii and Chrysoperla zastrowi sillemi (Esben-Peterson). Egg card of Spodoptera litura (F.) treated with various saturated hydrocarbons at two concentrations of 200 and 500 ppm were exposed to T. chilonis and C. zastrowi sillemi under laboratory conditions. The hexane extract of tetratriacontane (200- 500 ppm) was observed favourable with highest mean parasitization and emergence on T. chilonis (54.83 and 69.88%) followed by tricosane and pentacosane (50.70 and 64.61, 57.81 and 50.38%, respectively) as compared to hexane treated eggs (17.51 and 22.99%). Tetratriacontane, nonadecane, tetradecane and dotriacontane treated eggs of S. litura at 200- 500 ppm were favorable to C. zastrowi sillemi with a mean predatory activity of 79.19, 67.45, 63.09 and 60.60%, respectively, 24 h after introduction while it was 26.20% with hexane treated eggs. Top Keywords Kairomone, C14 to C34 saturated hydrocarbons, Spodoptera litura, Trichogramma chilonis. Top |