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tracks on a leaf?

Can someone enlighten me as to what would cause this?

IMG_20120731_193921.jpg
 
I noticed similar 'tracks' on a few of my plants this morning. I was thinking it was some type of tiny slug but would like to hear what others think.
 
that is 100% leaf miners.. im very familiar with them as they attack my citrus like crazy.. the only way to cure it that i know of with with a systemic pesticide, but i bet some one on this site knows a better way..
 
I hate leafminers! Only had them once many years ago and it was on edibles so traditional systemics were out of the question (Imidacloprid is evil stuff). Only one thing I found that worked, but it took a couple weeks: Neem oil

Mixed 2 Tbsp to a gallon of water with 1 Tbsp/gal of a safe soap (Like Dr. Bronner's, what I usually use), spraying it just before nightfall every 3-4 days.

Neem is perfectly safe and is mildly systemic (i.e. absorbs into the plant for further redistribution). Works in a strange way: It makes most insects forget to eat after 24-48 hours. Go figure. It also messes up their reproductive cycle by making them "forget" to breed. Amazingly, it doesn't affect beneficial insects.

Other than that, I have no idea what to do about those insidious bloodsuckers called leafminers. I'm not even sure there are any purchasable beneficial insects that attack them.

Good luck!
 
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