The Journal of Zoology Studies ` Vol. 1 No. 6 2014 Journalofzoology.com Page 11 The Journal of Zoology Studies 2014; 1(6): 11-16 ISSN 2348-5914 JOZS 2014; 1(6): 11-16 JOZS © 2014 Received: 25-10-2014 Accepted: 20-11-2014 N.M.Soomro Department of Zoology, University of Sindh, Jamshoro, Pakistan M.H.Soomro Department of Zoology, University of Sindh, Jamshoro, Pakistan J.I.Chandio Department of Statistics, University of Sindh, Jamshoro, Pakistan T.J. Ursani Department of Zoology, University of Sindh, Jamshoro, Pakistan S. Malik Department of Zoology, University of Sindh, Jamshoro, Pakistan Z.A.Palh Department of Fresh Water Biolody and Fisheries, University of Sindh, Jamshoro, Pakistan K.H.Lashari Department of Fresh Water Biolody and Fisheries, University of Sindh, Jamshoro, Pakistan Z.A. Laghari Department of Physiology, University of Sindh, Jamshoro, Pakistan Corresponding Author: Z.A.Palh Department of Fresh Water Biolody and Fisheries, University of Sindh, Jamshoro, Pakistan E-mail: zameer_ali110@hotmail.com Functional response of the predators mirid bug and wolf spider against white-backed planthopper, Sogatella furcifera (Horvath) Authors: N.M.Soomro, M.H.Soomro, J.I.Chandio, T.J. Ursani, S. Malik, Z.A.Palh, K.H.Lashari, Z.A. Laghari Abstract The feeding response of predators on eggs and nymphal densities of white-backed plant hopper (WBPH) was studied. The results indicate that the number of eggs and nymphs of WBPH consumed by the mirid bug greatly increased as prey density increased. It was also concluded that Cyrtorhinus Lividipennis is a voracious predator on eggs and nymphs of Sogatellafurcifera compared to the predator Pardosa pseudoannulata. Keywords: Feeding response, Predators, Prey 1. Introduction To check the growth and population of various pests, nature has provided predators. Unfortunately in Pakistan the study of these predators has not been exploited as thoroughly as their utility and economic importance would warrant. Knowledge about the beneficial insects is extremely limited and scattered in the literature. Present study highlights the control of white- backed plant hopper, Sogatellafurcifera (Horvath) a serious pest of rice [5,7] through mirid bug, Cyrtorhinuslividipennis (Reuter)and wolf spider, Pardosa pseudoannulata (Boe.& St.). The mirid bug, C.lividipennis and wolf Spider, P.pseudoannulataare probable the best predators. They have the potential to be a bio control agent of the prey. In developing countries particularly in Pakistan, where the use of insecticide is common the introduction of natural enemies would be beneficial. This study aims to determine the functional response of the predators to the white-backed plant hopper at all developmental stages at different densities.