~ 445 ~  Journal of Entomology and Zoology Studies 2016; 4(1): 445-447 E-ISSN: 2320-7078 P-ISSN: 2349-6800 JEZS 2016; 4(1): 445-447 © 2016 JEZS Received: 22-11-2015 Accepted: 24-12-2015 Muhammad Arshad Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Muhammad Irfan Ullah Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Ghulam Murtaza Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Mudassar Javed Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Muhammad Hannan Ahmad Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Correspondence Muhammad Arshad Department of Entomology, University College of Agriculture, University of Sargodha, 40100, Sargodha, Pakistan. Responses of different wheat genotypes against aphid ( Schizaphis graminum R.) and its natural enemies Muhammad Arshad, Muhammad Irfan Ullah, Ghulam Murtaza, Mudassar Javed, Muhammad Hannan Ahmad Abstract In the present study, incidence of aphid and its natural enemies was observed among different wheat genotypes. The genotype Mairaj-81 possessed maximum aphid population (6.83/tiller) and was proved the most susceptible as compared to others. The peak population of the aphid was observed on 18 March, 2014 (20.03/tiller) while population of aphid was observed minimum on 08 April, 2014 (0.01/tiller). Coccinellids and Chrysoperla carnea population was observed maximum (0.08/tiller, 0.44/tiller) respectively on MILLAT-11. Maximum population of Syrphid fly was observed on Mairaj 2008 (0.11/sweep). Keywords: Aphid, Wheat genotypes, Coccinellids, Chrysoperla carnea 1. Introduction Wheat (Triticum aestivum L.) is a suitable, nutritious and economical cereal crop. Worldwide, 20% of food calories are provided by wheat crop and also food for about 40% of total world’s population [1] . In Pakistan, wheat is a major food of Pakistan and grown as a cereal crop, but other plant material like straw, seed, and bran is used as a feed for livestock as well as used in industries. Wheat is the 2nd largest cereal crop and contributes more than 12% value added in agriculture of Pakistan and about 2.6% to GDP [2] . Unfortunately, wheat crop is threatened by number of insect pests like wheat weevil (Tanymecus indicus), wheat armyworm (Mythimna separata), white ants (Microtermes obesi) and aphids (Schizaphis graminum R.). Among these insect pests of wheat crop, aphid (Schizaphis graminum R.) is an important and destructive pest [3] . Aphids effect deeply within the leaf whorl by direct feeding and also inject a toxic material into plant which ultimately disrupts the chloroplast membrane [4] . To prevent losses caused by aphid, many control measures have been used like cultural, mechanical and chemical control. Biological control has some discrete advantages to many other control techniques due to relatively safe, stable and economical. Present study aimed to investigate the population dynamics of wheat aphids and their natural enemies. The study also focused on the varietal response of wheat against aphid and their biological control agents. 2. Materials and Methods The study was conducted at National Agriculture Research Center, Islamabad during 2014. Fourteen genotypes of wheat viz. Pakistan 13, Shahkar 13, NARC 2011, AARI 2011, Punjab 2011, AAS-11, MILLAT-11, NARC 2009, BARC 2009, Chakwal-50, Pirsabak-08, Lasani 2008, Faisalabad 2008 and Mairaj 2008 were selected to check the incidence of aphid and its natural enemies. The data regarding population of aphids, Coccinellids (larvae and adults), Chrysoperla carnea, and Syrphid fly adults were recorded from tillers of ten plants selected randomly from each plot at weekly interval. For assessment of aphid and its natural enemies, 10 randomly wheat tillers were selected by carefully examining whole plants. The data was subjected to statistical analysis (ANOVA) and means were compared using LSD all pairwise comparison test. Correlation was performed to check the relationship of aphid population with its natural enemies. All the statistical analysis was performed using Minitab 16.1 software.