Potted Mandarin Leaf Curl: Leaf Miner or Aphids

Citrus in large pots: mandarin has leaf curl and suspected leaf miner. Expert distinguishes:

Leaf miner: squiggly lines in curled leaves; cosmetic, not yield-reducing. Treat with horticultural oil or spinosad.
Aphids: cause curl on tender growth; more damaging. Blast with water or use insecticidal soap.

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