Citation | Muhammad, N. and S.A. Khan. 2022. Screening of selected canola cultivars for yield and tolerance against mustard aphid, Lipaphis erysimi Kalt. (Hemiptera: Aphididae). Sarhad Journal of Agriculture, 38(2): 497-503. DOI | https://dx.doi.org/10.17582/journal.sja/2022/38.2.497.503