Question

While both Thrips and Jassids suck sap from cotton leaves, the specific diagnostic symptom of heavy Thrips infestation on cotton seedlings is?

A Upward cupping and yellowing of leaves
B Downward curling and reddening of leaf margins (Hopperburn)
C Silvery/bronzed appearance and crinkled, distorted leaves
D Complete defoliation of the lower canopy
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