Possible deficiency but from what? Only on lower fan leaves...

[Dabfarmer]

Can someone possibly tell me what this is? Ive ben looking all over the internet for an answer and cant find anything quite like it.

 

[visajoe1]

did you look under the leaf, closely?

 

[Beachwalker]

 

[Dirtbag]

That really sucks. I empathize with you, it's a gut wrenching feeling to put months of care into something and have a nearly invisible pest come along and change everything. Ive been there.

 

[One drop]

That really sucks. I empathize with you, it's a gut wrenching feeling to put months of care into something and have a nearly invisible pest come along and change everything. Ive been there.

They are hard to eliminate I use a eco oil at 5 ml per lt I make up a 20 lt bucket and drench them fully set in dark 24 hrs then set under lights raised up to top of my tent 1800 ml high leave for 3 to 5 days re drench as per normal this will make sure you got a good kill set again in dark 24 hrs , check with eye loupe , before I set them back under lights I hose them down with very vine spray wash the plants down getting the underneath a good hit thats where 99% of spider mite hang out as well as there eggs , i do this 3 times max well before you flip plants to 12/12 light cycle .