International Journal of Academic and Applied Research (IJAAR)   Year: 2019 | Volume: 3 | Issue: 8 | Page No.: 10-13 Effect of Different Sowing Dates On the Population of Rapeseed Aphids (Homoptera: Aphididae) On Different Varieties. Abdul Jabbar,Mitha Khan, Abdul Waheed khan,Muhammad Ashraf, Rehmat Ali.6Ikhlaq Ahmed, Syed Abdul Malik,8Bakht Ali Abstract: The experiment was conducted in the Experimental farmer field Jaffar Abad. Five Rapeseed varieties namely, Toria,Sarson,canola,Raya and Mustard were grown in the Experimental Farm. All the Rapeseed varieties were grown on different sowing dates (20 October, 20 November and 20 December). Each variety were cultivated on (50 m2) plot with different sowing dates (20 October, 20 November and 20 December). Ten sub-plots from each variety were selected for collection of data. Five plants from each sub plot were taken for counting the population densities of the aphids. Whole plants were observed for examining the population densities of the aphids. Data were monitored on weekly basis. Data were taken after one month of the crop cultivation up to crop maturity. All the standard agronomic practices were conducted throughout course of the experiment. The metrological data were recorded throughout the experimental period. Data were subjected for statistical analysis.