Help please what is this?????

Hi, ive found these marks on a few of the leaves and i haven't got a clue what it is. There are about 5 leaves blemished with these marks. It's an outdoor grow in soil, just over 3 weeks into flower. If anyone could give me some idea as to what it is it would be greatly appreciated. By the way the plant looks to be healthy apart from these marks.

Thanks..

Do you give it nutes?
it could be nute burn

actually check out the faq's

GROWFAQ

they are leaf mners my friend - little bugs that live in and eat the plant matter in the leaf itself. they are infact moth grubs.

dodgy little fuckers that are hard to get rid of because they live in the leaf itself as explained. hence sprays will not work.

best to remove and burn all effected leaves at first sign of trouble.
can also use companion planting - e.g columbine - to encourage the adults to lay their eggs on other plants that appear more tasty to them.

good luck