New Citrus Gardener Queries

Hi all,

I have recently planted a Tahitian Lime, Eureka Lemon and a Valencia Orange
in the backyard.

I have noticed they are all showing signs of leaf miner - should I be
worried and if so, what should I do? I have heard about Petroleum Oil but
would like to stay organic if at all possible?!

Also, I planted them 2 months ago - in Brisbane (western suburbs) - and in
that time they have all had small flushes of new growth, but now have become
somewhat dormant ... is this normal?

Cheers,
Bob