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Experimental set-up of larval feeding choice assay. Pea and cabbage leaf discs were offered in an alternate order and a fourth-instar larva was placed in the middle of the Petri dish. The positions of larva were recorded after 5 min, 30 min, 6 h and 12 h, and percentage of consumed leaf area was recorded after 30 min, 6 h and 12 h, respectively.
