Vol. 11, Special Issue 10 (2022)

Author(s):
Omendra Sharma, DK Singh and Akshay Kumar

Abstract:
Determine bio-chemical constituent for their resistance against mustard aphid, Lipaphis erysimi (Kalt.) on Brassica genotypes under natural conditions of Kanpur UP. The study was carried out during Rabi 2015-16 at the oilseed research farm Kalyanpur and laboratory of the Oilseeds Section, Department of Entomology, CSA University Kanpur. Ten genotypes belonging to Brassica spp., viz., Basanti, Kranti, Urvashi, Vardan, Varuna, Rohani, Vaibhav, Pitambari, Varuna, BSH-1, and YST-151 were included Observations on the L. erysimi at Inflorescence stage and pod formation stage and aphid infestation index (A.I.I.) was computed. These data were correlated with biochemical parameters such as total phenols, sugars, amino acid content, and plant waxes. The genotypes viz., Basanti, Pitambari, and Kranti had plenty of phenol content on the base of the pooled mean of plant growth stages i.e. 1.51, 1.60, and 1.85%, respectively. The A.I.I. and total phenols were observed significantly negatively correlated (r = -0.92**). The effect of waxes in leaves and Inflorescence had a lethal effect (A.I.I. vs leaf waxes correlation being significantly negative with r = -0.91**). A.I.I. was observed significantly positively correlated with amino acid content (r =0.91**) and total sugar content (r= 0.98**). The present finding showed that a negative correlation has been observed between the phenol content and the aphid population.