Abstract
Mustard aphid, Lipaphis erysimi (Kaltenbach) is a major constraint in increasing the yield of rapeseed-mustard crops in India. Resistance to mustard aphid infestation and its correlation to some physiological and biochemical traits in selected varieties of different Brassica species were studied. Yield and oil content losses of up to 29.4% and 2.84%, respectively, were observed due to aphid infestation. Eruca sativa var. T-27 and Brassica carinata var. DLSC-2 were less susceptible to aphid infestation and had minimal yield losses. Surface wax, total glucosinolate, and phenol contents were found to correlate negatively with the aphid infestation, whereas the opposite relationship was obtained for the sugar content. The study suggests that physical and chemical barriers potentially play an important role in resistance against aphid infestation.
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