Anyone knows what this comes from

Checked my plants today and one of my plants that been in flower for a month now have these on some of the leaves with the buds. Is this something to worry about, and if so should I Harvest them??

Pictures?

Looks close, Manganese deficiency
Leaves may become yellow in between the veins, with mottled brown spots on the affected leaves. These brown dead patches may spread and eventually kill the leaf. Leaves may also shred and fall apart.
Overall growth of the marijuana plant may be stunted. With a manganese deficiency, the yellowing will begin at the base of the leaves and move outwards towards the tips.

Take a look at this

Kingtheo said:

Checked my plants today and one of my plants that been in flower for a month now have these on some of the leaves with the buds. Is this something to worry about, and if so should I Harvest them??

Click to expand...

At this stage there isn't much you can do except finish them out. I wouldn't go dumping stuff on them since they are pretty close to harvesting. Looks like you went a little too heavy on the nutes. What have you been feeding it?