PERFORMANCE OF SOME WHEAT CULTIVARS AGAINST APHID AND ITS DAMAGE ON YIELD AND PHOTOSYNTHESIS

Abstract

The aim of the study was to check the population dynamics on different wheat cultivars and to check the aphid damage on yield and photosynthetic activities on wheat crop. Aphid (Shizaphis graminum R.) herbivory results in significant loss yield in many crops. Planting resistant cultivars is a simple and effective method to reduce its damage. The experiment was conducted in agricultural farm of Multan, Pakistan. Four wheat varieties i.e. Galaxy 2013, Faisalabad 2008, Punjab 2011and AARI 2011 were sown on November 14, 2015. The study was conducted in Randomized Complete Block Design with three replications. The results revealed that aphids’ population was increased during last week of February to the 3rd week of March. Peak populations were recorded in 3rd week of March in all cultivars. But Galaxy 2013 showed significant difference in aphid abundance as compared to other cultivars. Also, Galaxy 2013 was significantly different for thousands grain weight, yield, photosynthetic rate and chlorophyll contents as compared to other cultivars. It was proved that Galaxy 2013 can withstand/tolerate aphid damage and give higher yield. Keywords: Wheat cultivars, aphid, yield, photosynthesis