leaf miner! remove leaves with the miners on them and dispose of in the trash can or burn them if possible. the leaf miners burrow between the upper and
lower leaf surfaces which makes them hard to control. best control is not to let them spread. GL
how does this earn you anything but contempt? ...this just proves you are part of whatever problem you seem to be having with 'cann', whoever that is.
...you would be far better served if you learned to ignore the critics, ...whining about them only gives them ammunition and proves them at least partially right.
The plant looks like it has plenty of leaves from your picture. I would say better than letting them spread. How many nodes to you have? 5 main fans might not be an issue if you have secondary leaves developed
so reading bozos reccommended article it says do a root application of neem. if i were you i'd do neem in the surrounding areas; and look for a more organic solution as for the soil application this article was pretty good too http://www.ehow.com/how_8101724_rid-plants-leaf-miners.html