Strange white line on leaf. Help! Pics.

I don't know what this is but its on a few of the leaves, the plant looks healthy so i hope its nothing major. Any help is much appreciated.

i have the same line on one of mine, im pretty sure its that spuge shit slugs leave behind. you got a mild case of the slugs man, check mine out...it looks like the signature on my roor....which is in need of use right now

To get rid of slugs just put a little pan or bowl or beer under the plant, it may be a waste of a brew but its worth it to save your babies.

beer! never heard taht one before ill try it out! thxs for the tip

thrips leave trails like that neem oil mixed weaker with a few drops of dish soap will stop them

hey i need help its been a few years since my last grow and what the hell??? i am having major issues right now 1st off my fan leafs are reaching towards the light and i dont mean cupping so i moved the 400watt mh away to a total of 3,1/2ft away there ony ten days old today and i also cutt the light timmer to only 15hrs a day and got the room temp at 79-80'fh with in and out fans and a small 5'' fan inside to keep the air moving,now i have knatts in the soil and i have small little bugs crawling on the leafs what the hell..so will lady bugs work for the fugus knatt and the spidermites or do i need a whole house fogger with that pertn,stuff does it work and how long do me and the wife gota be outa the house to air out the place and i am asumming that cats and dogs can not be around the fogger until after 3-4 hours,,,ilet me know anyone .......mattythemadman67