Sieving Varietal Resistance in Bread Wheat Cultivars and Chemical Control Efficacy Against Schiz aphis graminum R.
M. Adnan Shafiq, Rashid Rasool Khan, M. Shakeel, M. Javaid Akhter, M. Ahmed Waqas, M. Usman Anees and Umair Gull
Corresponding Author : M. Ahmed Waqas
Department of Entomology, University of Agriculture, Faisalabad. 38040. Pakistan.
Email ID : firstname.lastname@example.org
Received : 2015-09-04 Accepted : 2015-11-04 Published : 2015-11-04
Abstract : Current field trial was conducted to screen out varietal resistance against wheat aphid (Schiz aphis graminum R.) in four wheat cultivars viz. Galaxy-2013, Punjab-2011, Millat-2011 and Sehar-2006 and comparative toxicity of three synthetic insecticides (pymetrozine 50 WG, imidacloprid 20 SL and lambda-cyhalothrin 2.5 EC) was also evaluated through foliar application at their recommended doses. Aphid infestation started in last week of January, reached on its peak on 15th of March and vanished up to 10th April. The most resistant wheat cultivar with minimum aphid infestation was Galaxy-2013 (18 Â± 0.49 mean aphids/tiller); whereas, Sehar-2006 (27 Â± 0.29 mean aphids/tiller) came out as most susceptible among other cultivars. Imidacloprid appeared to be most effective and persistent insecticide with maximum aphid mortality i.e. 97.13% (1.26 aphids/tiller), fourteen days after treatment. Tenacity of imidacloprid was also justified by wheat grains analysis through HPLC technique for insecticides residual toxicity with maximum limit of detection i.e. 0.005 mg kg-1, which is negligible as compared to WHO standards for maximum residual limits. This study concluded that Galaxy-2013 is a resistant wheat cultivar and with the judicial use of imidacloprid it can be used as worthy tools in IPM to keep aphid population below than economic injury level.
Keywords : Wheat, Varietal resistance, wheat aphid (Schizaphisgraminum), insecticides, Pakistan.
Citation : M. Ahmed Waqas et al (2015). Sieving Varietal Resistance in Bread Wheat Cultivars and Chemical Control Efficacy Against Schiz aphis graminum R. J. of Advanced Botany and Zoology, V3I4 DOI : 10.5281/zenodo.918348
Copyright : © 2015 M. Ahmed Waqas. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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